C H E M I S T R Y
Complete, practical home-study courneft i>rrp tired by some of the bc»t-known chemists in this c o u n tr y , in c lu d in g Ai.i.en R o g e r s , B.S., M.S.. P h.D .— H e a d o f
D epartm ent of In- ' dustrial Chem istry, I P ra tt In stitu te ; L. [M . T o l m a n , Ph.D ., V ic e - p r e s id e n t, I U n ite d C h e m ic a l and Organic Prod
u c t s C o.; Br a d l e y St o u g h t o n, B .S .—
Head of t h e D e
-E
artm ent of Metallurgy, Lehigh U niversity, and w i n S t i i s s , P h.D . — Professor of Applied ChemUlry, In lv m ily of Pennsylvania.M a il C o u p o n f o r F r e e B o o k l t t I N T I H N A T tO N A L SC H O O L OF C H E M IS T R Y ~~l
I
D ivision of th eIn te rn a tio n a l Correspondence Schools
(
Box 7 6 3 4 -G , S cranton. Penna.\V |tlim it cost or o b lig atio n , p lease send m e f u ll I ilolnlli* of your ho m e-stu d y course In
A nnlytlcal C h e m istry □ M etallu rg ical C h em istry I C hem ical E n g in e erin g Q S h o rt C h em istry Course I In d u s tria l C h em istry □ Pharm acy
.l o t I O ' • P ! I □ i N ii me
MIND POWER,
A FR EE B O O K
D e v e l o p y o u r p e r s o n a l , c r e a t i v e p o w e r ! A w a k e n \ ib o silcni s le e p in g fo rces in yo ur ow n co nscious- In e s s 3 e c o m e M a s t e r o f y o u r o w n l i f e . P u s h a s id e o b s t a c l e s w it h a n e w e n e r g y y o u h a v e o v e r * ’ lo o k e d . T h e R O S J C R U C l A N S k n o w h o w , a n d w ill ^ h e lp y o u a p p l y t h e g r e a t e s t o f a ll p o w e r s in m a n 's ’ c o n t r o l. C r e a t e h e a lt h a n d a b u n d a n c e f o r y o u r s e l f . 1 W r i t e f o r F R E E b o o k , " T h e W i s d o r n o f t h e S a g e s '* . It \ ♦ells h o w y o u m a y r e c e i v e t h e s e t e a c h in g s f o r s t u d y a n d ’ u s e . I t m e a n s t h e d ^ w n o f a n e w d a y f o r y o u . A d d r e s s . ' Scribe P . C . T . R O S t C R U C I A N B R O T H E R H O O D S a n Jose ( A M O R C ) C a l i f o r n i a
We Want Inventions
or practical ideas th a t might be developed into pat ented products. If you have an invention, either patented or unpatented, or an idea for sale, don't delay communicating fully w ith us, in strict confi dence.
Suite 1027-S, 2014 E. 9th S t., C leveland, Ohio
P r in t Y o u r O w n
C a rd s , S ta tio n e ry , A d v e rtis in g ,lab e ls, p a p e r, c irc u la rs , t a a s , e tc . S a v e m oney a n d tim e . Sold d ire c t fro m f a c to ry only . J u n i o r P r e s s S S . 9 0 , J o b P r e s s ,H I , P o w er $1-19. D o p o p u la r ra is e d p r in tin g lik e e n - g r a v in g w ith a n y o f o u r p re s s e s . P r i n t f o r O t h e r s , B ig P r o f it s . P a y s f o r i t s e lf in a s h o r t tim e. E a s y r u le s s e n t. W rite f o r f re e c a ta lo g o f o u tfits a n d a ll d e ta ils .
The Kelsey Co., H-33. Meriden, Conn.
Inventions Wanted
Patented or Unpatented
Our m anufacturer-clients now want additional improved inventions. W hat have you?
C hartered Institute o f A m erican Inventors
565 B a r r i s t e r B u ild in g W a s h in g to n , D . C. " W o r ld 's L a r g e s t O r g a n iz a tio n o f I n v e n to r s '*
Electrical Engineering
N e w o p p o r tu n i ti e s c o n s ta n tly - o p e n in g to m e n p ro p e rly tra in e d . K le rir lc a l E n g in e e r in g Is s till o n e ot t h e b ig g est, lIvcHt. f.iMirsi. (tro w in g fields. P r a c tic a l tra in in g , la rg e ly o f ro lleg u .s ta n d a rd , g iv e n b y b o rn e s tu d y . T e x ts w r itte n b y
2 S :iu lh o rltlcH fro n t C e n e r a l K lee trie , W e s tia g h o u s e , M as*.
I n s t, o f T e c h n o lo g y , i,c liie h . e tc .: u s e d b y r e s id e n t c o l leges. t r a d e sc h o o ls. IT. .S. N a v y . e tc . S c h o o l c h a r te r e d 35 y e a rs n u o a s e d u c a tio n a l In s titu tio n , n o t fo r p ro fit, lik e b est r e s M e n t voIU'k w, u m l :«> e x e m p t fro m ff. ,S. in e o in e
ta x . W rite f o r B u lle tin , l i s t o f l o c a l s tu d e n t s a n d g r a d u a te s .
American School, Dpt. E - 1 4 8 , Drexel at 58 St., Chicago
G I V E T H E G I F T T H A T ’S A L W A Y S W E L C O M E M ak e it a H a p p y C h ris tm a s w ith P o p u la r S c ie n c e M o n th ly . S p e c ia l ra te s th is y e a r fo r re a d e r s . S ee in sid e of b a ck cover.
PICKED MEN TR A IN ED TO
LEAD SEA POLICE
('C ontinued fro m page 3 9)
dope sm uggler is also active. A rm ed w ith sm oke screens, m achine guns, super-pow ered boats, a nd even poison gas, these outlaw s are playing a fierce b u t losing game w ith th e law.
Against these smugglers, th e little sailing cu tters of th e old days have given w ay to a fleet o f several hundred sw ift picket boats, stu rd y steel c u tters w ith turb o -electric drive, sixteen pow erful destroyers. Seven b ra n d - new, 165-foot D iesel-pow ered p a tro l b o a ts were recently added to this service in th e vicinity of N e w Y ork. An ever-tightening cordon is being d raw n a ro u n d o u r 10,000 miles of coast.
C ap tu re o f the ru m -ru n n er is only one of m any duties of the C oast G uard. M ore th a n 300 wrecks, derelicts, a n d o th er dangers to navigation are destroyed each y ear by ram m ing, gunfire, or Explosives. L aw s re lating to navigation, quarantine, a n d n e u trality m u st be enforced. M edical aid is rendered to vessels engaged in deep-sea fish ing. R eg attas an d m arine p a rad e s are p a trolled. P ro tectio n is given to seal herds, gam e, and salm on' fisheries in Alaska. M edi cal a tte n tio n , police pro tectio n , provisions, a n d legal services are carried to isolated villagers of the fa r n o rth .
S
IN C E th e fateful night in April, 1912,w hen th e T itanic ram m ed an iceberg off the G ra n d B anks and sank w ith the loss of 1,500 lives, tw o cu tters have been detailed each spring to p a tro l the danger region, noting the size, position, a n d d rift of icebergs floating near the shipping lanes, and broadcasting the in fo rm atio n to passing vessels. F ro m 1,500 to 2,000 ships, $ 10,000,000,000 in p roperty, and 1,000,000 lives pass through this zone each season. D ue to its w atchfulness, n o t a single ship h a s been lost by collision w ith an iceberg since the p a tro l has been in operatio n .
M ost im p o rta n t of all the duties of the C oast G uard, how ever, and the one pursued a t the expense of all the others w hen oc casion dem ands, is the rescue of lives a n d ships. T o this end, every officer m u st be a hero as well as expert seam an. F ro m D e cem ber to M arch, the m ost h azardous m o n th s of the year, c u tters of the service continuously plow th rough th e danger areas, a le rt for the call of a disabled ship. M ore th a n 250 active land stations, w ith launches a n d surf boats ready to push into the w aves, keep w atch from the shore.
D uring the fiscal year ending in 1931, the officers, c u tle r crews, and su rfm en assisted vessels and cargoes w o rth $47,959,465, and saved 5,627 lives. D uring the last eighteen years, th e value o f property saved is m ore th a n $600,000,000 and m ore th a n 50,000 persons w ere rescued.
O
N T W O recent trips to New L ondon Isaw the buildings of this in stitu tio n , talked w ith th e m em bers of the faculty, an d saw the cadets h ard a t w ork. Of Colonial design, faced w ith brick an d lim estone, the buildings have been ad ap ted to the configur ation of the land. I n the fro n t row , facing aw ay from the river, are the classroom an d ad m in istratio n buildings a n d the cadet b a r
racks. Behind these, low er 011 the slope, are
the m achinery building an d the enlisted m en ’s q u arters. T he com bined arm o ry a nd gym nasium , a n d the athletic field overlook the river and w h arf.
C aptain R andolph Ridgely, Jr., is the first su p erin ten d en t of the new Academ y, coming to the position from the com m and of the N ew Y ork D ivision o f the C oast G uard. C aptain Ridgely served in the W orld W ar, in the subm arine zone.
C ap tain Q. B. N ew m an, for m any years
E nginccr-in-C hief (C o n tin u ed on page 9 3)
S T U D Y A T H O M I
L egally train e d mon win hl«ji positions an d biff eucce89 in buaj* nees and public life. Be indeponiji e n t.G r e a te r onportunitien now that ov er b e fo re . Ki# co rporations *j# hea d ed by men with leg al tra in in «.E»ri 3 8 ,OOO to 3 X 0 ,0 0 0 A n n u ity
fuT g ra d u a te s in every section o f th e U nited StaUi, Wo furn ish all te x t m ateria l, including fourteen-v olu m e Law Libr»rj. Low cost, ea sy term s. G e t o ur vafuabfe 64-pa*e " L a w G u id e" *04 " E v id e n c e " books F R E E . Send for them NOW.
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Managers Inventors
A personal confidential and efficient service. Without obligations nrite and state your difficulties. Scientific« r advice in technical-mechanical problems. Designing nitil D rafting of Plants, Machines, A pparatus. Have yogr drawings checked before you build. C alculations Patent sales. 15 years of experience.
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IN V E N T O R S i p f
facts before applying for Patents. Our hook Pat ent S t m gives those facts; sent free. W rite L A C E Y & L A C t i
635 F S t..N .W .D e p t. 10, W ash in gto n . D .C. E stab lish ed 11)1
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W ork fo r 30 d.*iys fr e e re a d in g . Send na m oney. I f you decide to k ee p it, th en s<*ni mo only $1. I f n o t, re tu r n it. W RITE TO* D A Y . N o t s e n t t o b o y s u n d e r 1 7 y e a r s o f a g e . T. C. Coale, Book Dept 13-61 1920 Sonny siife Ave.. Chicago, IH J
Book on PATENT
“ P r a c t i c a l P a t e n t L a w ” , 420- ■ J | S M I p a g e book, s a v e s i n v e s t o r s ■ I n i m o n ey a n d tim e . S h o w s w h a t is W V l p a te n ta b le , h ow to p ro te c t y o u r Jp a te n t s , r e la tio n t o p r io r p a te n t s , p o s s ib ilitie s o f in frin M m e n t. W r itte n so you can u n d e rs ta n d by n o te d p a te n t autlMg ity . S a v e c o s t m a n y tim o e. S e n d o n ly $4.50, v o lu m e shlpM o n 6 d a v s a p p ro v a l, i f n o t s a tisfie d , m o n ey w ill be re fu n d
C O M M E R C E C L E A R I N G H O U S E , D e p t . 3 3 9 1 2 0 5 W . M o n r o e S t . , C h i c a g o
The TRUTH about V0IC1
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P A T E N T S -T R A D E MARKS
All cases subm itted given personal attention tip | members of the firm.
In fo rm a tio n and B o o klet Free
LANCASTER, ALLWINE & ROMMEL
p a t e n t l a w o f f i c e s
S H O W C A R D
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l e a r n a t H o m e
He r e is the very course you need if you w ant to get a good paying position as a Show Card Letterer or Sign Letlercr, or have a business o f your own. This course is complete and prac tical and especially arranged to m eet the needs of the student who studies a t home. I t was written by E. L. Koller, Principal of th e In te r national School of A rt, member of the American Federation of A rts, and T h e N ational Society of Craftsmen.
H. L. Wood, a clerk, made m ore than $700 “ on the side” before he had completed this course and also won §125 in prizes. H arry Lord writes th a t he has more than doubled his salary as a result of studying in spare time. W illiam W hitm an, a former wagon builder, now has a sign painting business of his own and is earning t h r e e t i m e s as much as he did before enrolling w ith th e International School of Art'.
M a il C o u p o n fo r F r e e B o o k le t
IN T E R N A T IO N A L SC H O O L O F AR T A ssociated w ith the
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T A L K I N G P I C T U R E S & E L E C T R I C I T YIn j u s ta f e w y e a r s . Radio has becom e one of the w o rld 's leading indus trie s . T alking p ictu re s have b ro u g h t new life aud opportunity to th e M ovies. Now. TeJevisJoj} is h e re w ith a p ro m ise o f g ro w th atm) a c tiv ity so
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S p e c ia l N ew C o u rs e - R a d io B r o a d c a s t T e c h n ic ia n i to stu d e n ts w h o en roll Im m ediately. We b ro a d c a s t o v e r o u r ow n
i learn to o p erate all kinds o f la te s t equipm ent.
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75$ o f our s tu d e n ts a re ea rn in g th eir living ex p enses while a tte n d in g school now . W e help you g e t a jo b . If you a re s h o rt of money w rite an d explain your p roblem . W e also allow your Coach R ailroad F a re to Los A ng eles. Send fo r F ree Book
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D e v e lo p y o u r p e r s o n a l , c r e a t i v e p o w e r ! A w a k e n ’ t h e s il e n t s le e p in g f o r c e s in y o u r o w n c o n s c io u s - ' n e s s . B e c o m e M a s t e r o f y o u r o w n l i f e . P u s h a s id e ’ a ll o b s t a c le s w it h a n e w e n e r g y y o u h a v e o v e r - ] lo o k e d . T h e R O S I C R U C I A N S k n o w h o w , a n d w ill ^ h e lp y o u a p p l y t h e ' g r e a t e v t " o f a ll p o w e r s in m a n ’s * c o n t r o l. C r e a t e h e a lt h a n d a b u n d a n c e f o r y o u r s e l f. } W r i t e f o r F R E E b o o k , " T h e W i s d o m o f t h e S a g e s " . I t \ t e ll s h o w y o u m a y r e c e i v e t h e s e t e a c h in g s f o r s t u d y a n d ’ u s e . I t m e a n s t h e d a w n o f a n e w d a y f o r y o u . A d d r e s s , S c r i b e N . S . B . R O S I C R U C I A N B R O T H E R H O O D S a n J o s e ( A M O R C ) C a l i f o r n i aCARTON
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S en d nam e and address fo r fr e e details. O n l y .. R A Y E B U R N S S C H O O L . D e p t. S - X . B o x 2 1 9 4 . C le v e la n d ,
M a k e m o n e y t a k i n g p ic tu r e s . P r e p a r e q u ic k ly d u r in g s p a re tim e . A lso e a rn w h ile y o u le a r n . N o e x p e rie n c e n e c e s s a r y . N ew e a s y m e th o d . N o th in g e ls e lik e i t . S e n d a t o n ce fo r fre e b o o k . O p p o r t u n i t i e s i n M o d e r n P h o t o g r a p h y . an d fu ll p a r t i c u l a r s . A M E R IC A N SC H O O L O F P H O T O G R A P H Y D e p t. 1 3 6 5 . 3 6 0 1 M ich ig a n A ve. C h ic a g o , U . S . A .
S e c r e t s o f S u c c e s s
BECAME A SUCCESSFUL
RADIO MARINE OPERATOR
( C o n tin u e d f r o m page 9 7 ) tio n , I w as en g ag ed a n d s e n t o u t as a R a d io O p e r a to r on a p a ss e n g e r v esse l sa il ing f o r th e W e s t In d ie s . S ince th a t first jo b , w h ic h seem ed lik e a little g lim p se o f h e a v e n to m e, I h a v e sailed all o v e r th e w o rld , to u c h in g p o r ts I n e v e r d re a m e d ex iste d . T o sa y th e re is no c o m p a ris o n b e tw e en th is w o rk a n d th e w o rk I did b e fo re ta k in g u p th e sch o o l c o u rse is to m a k e an u n d e r -s ta te m e n t! I n o w h a v e a p ro fe s s io n t h a t I c an b e a n d a m p ro u d o f, a n d m y w o rk is s te a d y , y e a r in a n d y e a r o u t. N o t o n ly is th e p a y ' go o d , b u t a ll m y tra v e llin g a n d living ex p en ses on d u ty a re p a id fo r. T h e r e ’s no su c h th in g a s a d u ll m o m e n t in th is w o rk , a n d I h a v e t h a t fe elin g o f s a tis fa c tio n a b o u t m y jo b t h a t m a k e s i t th e b ig g est su c c ess a m a n c a n w a n t.
T o th e m a n w ith n o sp ecial tra in in g , a n d w ith a h a n k e rin g fo r so m e th in g b e t te r in life , I ’d sa y th a t th is is th e tim e to ta k e a n o th e r lo o k a t th a t a d v e r tis e m e n t h e h a s seen fro m tim e to tim e . I su g g e st w ritin g fo r p a r tic u la r s a n d s h a p in g a c o u rse fo r im p ro v in g h is f u tu r e c a re e r. W h e n th e s e du ll tim e s a re o v er, th e d e m a n d f o r w e ll-tra in e d m en in e v e ry lin e w ill be g r e a te r th a n e v er. T a k e a d v a n ta g e o f th e lull n o w an d b e p re p a re d fo r th e b o o m t h a t w ill com e la te r. A s fo r ra d io , to m e its o p p o rtu n itie s seem ed lim itle ss. A s it h a s b e en u p till n o w , w ith th e tr a in e d m en g e ttin g th e b e st b re ak s, it will c o n tin u e to b e in th e n e w fields th a t w ill b e o p e n ed in th e f u tu r e .— H . R . W a llin , B ro o k ly n , N . Y .
Cash Prizes
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S e c r e t s o f S u c c e s s
THIS FARMER IS MAKING
MONEY IN HARD TIMES
( C o n tin u e d fr o m page 8 9 ) w o u ld be m u ch to lea rn . W e w ro te to th e D e p a r tm e n t o f A g ric u ltu re , a t W a s h in g to n , a n d to th e S ta te C ollege. In re p ly , w e re c e iv e d a n u m b e r o f b o o k le ts on b u tc h e rin g a n d c u rin g m e a ts. A f te r w eeks o f re a d in g a n d s tu d y , we w ere re a d y fo r o u r first e x p e rim e n t— p o rk . W e fo u n d th a t h a n d lin g a n d selling o n e hog to o k e x a c tly one w eek . T h is d id n ’t seem v e ry fa s t fo r th e a m o u n t o f w o rk p u t in to th e jo b . B u t w e w ere v e ry c a re fu l a b o u t b e in g c le an , a n d o u r tr a d e in c re a s e d slow ly. S a u sa g e w as o u r s p e c ia lty , a n d th e r e s ta u r a n ts in to w n b eg an b u y in g it in in c re a s ing q u a n titie s . T h is y e a r w e b eg an to sell so m e b eef, a n d fo u n d it o ffered a g re a t d e al m o re w o rk th a n sellin g p o rk . T h e re w as m u ch m o re o f i t to d isp o se of in sm all a m o u n ts . O u r m e a t w as te n d e r a n d fres h , a n d w e h a n d le d a n d w ra p p e d it w ith e v e ry p r e c a u tio n . N o w w e h a v e a fa ir tr a d e a m o n g e a tin g h o u se s a n d te a ro o m s. W e h a v e ju s t fin is h e d o u r last b u tc h e rin g jo b th is w eek, a s it w ill so o n be w a rm w e a th e r, an d w e in te n d to ra is e p o ta to e s a n d o th e r tr u c k to sell th is S p rin g a n d S u m m e r to o u r sa m e tra d e . T h is w ill a s s u re u s o f a re a s o n a b le a m o u n t o f bu sin ess.
I t m ea n s, as y o u can see, a g re a t deal o f w o rk . I t s re w a rd is in k eep in g us going till p ric e s s t a r t to rise. W e d o n ’t call it fin a n c ia l su ccess, b u t it h a s been th e m e a n s o f se c u rin g fo r us a sm all a n d fa irly s te a d y in c o m e , w h e re b e fo re w e h a d th e p ro s p e c t o f lo o k in g fo rw a rd to n o th in g a t all.— J . I . E ., T iffin, Io w a.
Cash Prizes
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H I S d e p a r t m e n t w ill g iv e $5.00 f o r e v e r y t r u e s u c c e s s s t o r y s u b m i t t e d b y r e a d e r s o f P o p u l a r S c ie n c e M o n t h l y , a n d w h i c h is a c c e p t e d f o r p r i n t i n g in t h is m a g a z in e . M a n u s c r i p t s w ill b e j u d g e d o n th e i n d iv i d u a l m e r i t s o f t h e c a s e a n d c i r c u m s t a n c e s in v o lv e d . O n l y s t o r i e s in w h i c h t h e a u t h o r ’s s u c c e s s , o r t h a t o f s o m e o n e k n o w n t o t h e a u t h o r , h a s b e e n g a in e d b y s o m e m e t h o d o f e d u c a ti o n a l g u i d a n c e , f i tn e s s f o r th e j o b , o r a p p l i c a t i o n t o t h e w o r k w i l l b e c o n s i d e r e d . W e a r e n o t l o o k in g f o r t h e “ g e t - r i c h - q u i c k ” t y p e o f s t o r y . M a n u s c r i p t s m u s t b e c o n f in e d t o 500 w o r d s o r l e s s . T h e y m u s t b e t r u e a n d , i f a c c e p t e d , a u t h o r s m u s t b e p r e p a r e d t o g iv e u s s i g n e d s t a t e m e n t s t o t h e e f f e c t t h a t t h e y a r e t r u e . M a n u s c r i p t s s u b m i t t e d a n d p r i n t e d b e c o m e t h e p r o p e r t y o f t h i s m a g a z in e , a n d w e a r e n o t r e s p o n s i b l e f o r th e r e t u r n o f r e j e c t e d s t o r i e s u n l e s s p o s t a g e is p r o v id e d f o r t h i s p u r p o s e . A d d r e s s c o n t r i b u t i o n s t o S u c c e s s S t o r y D e p a r t m e n t , P o p u l a r S c ie n c e M o n t h l y , 381 4 t h A v e n u e , N e w Y o r k C ity . M e a s u r e y o u r p r o f i t s w i t hFLEXIBLE STEEL RULES
E x a c t l y l i k e $ 2 .5 0 R e t a i l e r . 3 9 in c h . $ 1 . 3 0 T io z . —s a m p l e 1 5 c ; 7 8 i n c h $1 O.'i D o z .— s a m p l e 2 5 c : 7 8 i n c h a u t o m a t i c ( a s illim t r a t e d ) $ 2 .8 0 D o z .— s a m p l e 3 5 c . S a m p le s o f (I s t y l e s , $ 2 .2 5 — O R D E R T O D A Y . A . I I . T I I E I ' E I t C O . D e p t . F 1 0 . 3 3 U n i o n S q u a r e , N . Y .
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(C o n tin u ed from page u )
A 7-REE BOOK
D e v e lo p y o u r p t i v e p o w o rt A w a U n \ t h o s ile n t slc« *|» ln g f m # i » IP ry^ j r o w r j^ c o m c lo u i- n o s s . B e c o m e M «ll«r y e u r o w T ^ flfe . f*uiV> M id # ’ o b s t a c lo i w ltH » »»«<* t n o r g y y o u h « v e o v e r , lo o k e d . T li# HOIK U U C I A N S k n o w h o w . *nd w i l l ! h e lp y o u 4 |t|« ly Ih n ij u m t m t o f d ll p o w o n In m « n 'i I c o n t r o l. C m - * U a n d a b u n d a n c e fo r y o u r i e l f . W r i t e for f NM l**»ol, " T h e W is d o m o f t fie Itl t e lls h o w you inay r e c e i v e t h e s e t e a c h in g ! ( o r i t u d y a n d ] u s e . If no#*n» l h « d a w n o f a n e w d a y f o r y o u . A d d r e t i , ) S cribe J . L. X. R O S I C R U C I A N B R O T H E R H O O D S#« J### (AM O RC) CtliforniaFREE LESSON
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Inventions Wanted
Patented or Unpatented
M anufacturers now showing increased inter e>t in sound inventions. W hat have you?
C hartered Institute of A m erican Inventors
539 B a r r i s t e r B u il d i n g W a s h i n g t o n . D . C . “ W o r l d 's L a r g e s t O r g a n i z a t i o n o f I n v e n t o r s * '
Superchargers, driving a blast of air into the c arb u re to r to m ake up for th e reduced pressure in rarefied atm ospheres, help these gasoline m otors. T hey are heavy, how ever, adding to th e weight of the plane, and they never com pletely prevent loss of pow er at high_altitudes.
N ow consider the steam engine. It loses no pow er a t all w ith altitu d e an d gains in effi ciency the higher it goes! T h is is bccause the pressure on the exhaust is less in th in air th an a t sea level. T hus the perfection of the flying steam engine is a vital step to w ard conquering the strato sp h ere.
Realizing these facts, inventors in various p a rts of th e w orld have been w orking to w ard the goal achieved by the Besler brothers. In A kron, Ohio, last fall, a local inventor, H arold C. John so n , announced the com pletion of a steam engine w ith tw o opposed cylinders, w eighing, com plete w ith boiler, only 146 pounds.
Some m o n th s earlier, it became know n th a t the G reat Lakes A ircraft C om pany, a t Cleve land, Ohio, w as w orking upon an experim ental steam -d riv en biplane. R ecent dispatches from France rep o rted th a t a P aris m echanic had p erfected a light steam pow er p lan t for a ir planes. A n o th er news item , com ing from Sw eden, to ld of steam -tu rb in e engineers who are w orking on a new -type tu rb in e for a ir c ra ft use, while a th ird , from Italy , carried the in fo rm atio n th a t G. A. Raffaelli, an a ero n au ti cal engineer, had announced a steam engine for stra to sp h ere m achines.
B u t it w as the tw o California inventors, carrying on their secret researches, w ho first achieved the long-sought goal of steam -driven flight.
E v er since H enri Giffard, in 1852, navigated the air in the w o rld ’s first dirigible, creeping along near the ou tsk irts of P aris a t seven miles
an h o u r propelled by a clumsy three-horsi pow er steam engine weighing 462 pounds, tbci have been proponents of steam pow er for air* craft.
M any of the pioneers of flight, before thl perfection of the gas engine, sought to fly b steam . In 1804, Sir H iram M axim , the Engliil inventor, spent $200,000 building a giganttf
m ultiplane weighing 8,000 pounds an d havinj
a wing area of alm ost 4,000 square feet. Driven by a 363 horsepow er steam engine an d tW( eighteen-foot propellers, th e g ian t c ra ft reachw th irty-six miles an h o u r on special track s bull! to hold it dow n during the prelim inary testli Its lift a t this speed w as so great th a t it tor*' loose from the tracks, crashed over on one sidfj and demolished itself.
T w o years later, Samuel P ierp o n t Langley, secretary of Sm ithsonian In stitu tio n , Wash! ington, I). C., saw his sixteen-foot m odel ity for half a mile above the Potom ac R iver proi pelled by a m iniature, seven-pound steam en« gine, developing one and one-half horsepower, T he full-sized tandem m onoplane w hich Lang« ley pattern ed a fte r this m odel in 1903 am which was broken in launching, carried a gaso« line m otor instead of a steam pow er p lant
A fter 1903 an d the success of the Wright B rothers, steam pow er for a irc raft w as prac* tically lost sight of. Gasoline engines madl such rapid advance in lightness an d reliability th a t they cam e into universal use in aviation* Recently, how ever, the advantages of steam; pow er have again been a ttra c tin g an increasing am ount of a tten tio n .
W ith the first experim ental m achine already climbing into the air a t O akland, steam has, ill last, been harnessed to w ork in the sky. Ex<i p erts arc w atching the progress of th e invent* ors with the keenest interest. T h eir machine a definite step towrard the huge, winged steamy ers of the sky visioned by pioneers of flighl
A U T O GLASS TH A T'S CRASH-PROOF
(C ontinued from page 5 6)
“ W h a t’s the secret of the stu ff? ” inquired K ennedy .as he exam ined the cracked su r face of the safe glass.
“ I t ’s no secret,” replied Gus. “Safe glass is m ade of tw o polished pieces of plate glass cem ented to a center sheet of tran sp aren t plastic m aterial like celluloid. T his center sheet is tough yet pliable and holds the o u ter an d inner glass in place when it cracks.
" H P H IS black edging,” Gus continued, “is a w a terp ro o f cem ent th a t seals over the edge of the plastic filler. A fter the tw o sheets of plate glass an d the center sheet are bonded together under pressure and heat, the sheet of safety glass is dipped in acid. T he acid eats aw ay the plastic filler and form s a shallow groove aro u n d the sheet. W hen cem ent is forced in this groove, the plastic center is sealed in airtig h t. M oisture and air can ’t get at it.”
Jo e C lark, standing in the garage d o o r w ay, listened in ten tly as his p a rtn e r ex plained the process. “D o you know how they discovered the stu ff?” he called when Gus had finished.
“A bout th irty years ago some French scientist w as using a so rt of liquid celluloid in his w ork. One d ay he forgot to cork the bottle. Of course, the liquid evaporated and left a th in layer of celluloid, o r som ething like it, on the inside of the glass bottle. Ik- p u t the b o ttle aside and forgot ab o u t it u n til one d ay he accidentally knocked it from the shelf. I t crashed to the ground, b u t in stead of sm ashing to bits, it shattered, hold ing its shape. T he hardened liquid held the cracked bits of glass in place. T h a t gave him an idea a nd sho rtly a fte r sh atterp ro o f glass
was developed.”
“ B ut doesn’t all glass of th a t kind get discolored a fte r a tim e ? ” K ennedy inquired* “ N ope,” Gus told him. “T h e seal I juij told you ab o u t stops discoloration to a grcnj extent and a new ty p e of tran sp aren t filli sheet has been developed th a t’s no t affecti by the su n ’s rays. Good sh a tte r-p ro o f gliu(| will stay clear as long as i t ’s in ta c t.”
“ I d o n ’t d o ubt th a t safe glass is a won* derftil thing,” Kennedy agreed, “ b u t it cosl a lot of dough.”
Gus shook his head. “ B ut i t ’s .an invest m ent, a safety investm ent,” he pointed ou| “ F ifty percent of all the injuries in auto m obile accidents come from flying glasl T w enty or th irty bucks isn’t m uch to spent to m ake your car fifty percent safer to ridi
in, is it ? One good sm ash-up, when yo|
have a c ar full of people, will cost you lot m ore th an th a t in d o c to r’s bills aloni
" V /'O I T K E paying a doctor right now an< I accidents like yours can happen ailj time. G enerally it w o n ’t be y o u r faul^ eil h e r .”
"I guess y o u ’re rig h t,” said K ennedy aflti a pause. “ Suppose you fix m y car up will it. W ith children in the fam ily, safety
m«iilj
som ething.”“Ju st the w indshield?” G us asked glandj ing a t K ennedy.
“ N ot on y o u r life !” K ennedy replied. "I| I do it a t all, I ’ll do it right. P ut in ~:<H glass all ro u n d .”
“ F in e!” said Gus as he w rote out tlif order. “ S afety isn’t som ething to buy \ parts. P u t it in fro n t, back and sides ati driving a car will be less of a w orry to youl
m
H/ A A T T E R ®
? c
W HY YOUR CAR’S MOTOR
WILL OVERHEAT
(C o n tin u ed from page 56)
low speed m ay be lifted clear off the fan pulley by centrifugal force at high speed. A belt can be p re tty loose and still drive the fan when the m o to r’s idling.”
‘‘I* certainly beats all how you can ro o t ou t tro u b le on a car,” Crowley said adm iringly to G us when the trip to R ound L ake w as re sumed. “ H o w ’d y o u know the cooling system was clogged up. All you did w as p a t the ra d ia to r here and th ere.”
Gus chuckled. “Y o u ’re right, t h a t ’s all I did bu t it told the sto ry . And th a t's th e sim plest w ay to find out w h a t’s the m a tte r w hen a car overheats. Y our rad iato r w as cooler a t the b ottom than at the top. T h a t show ed m e th e w a ter w asn’t circulating. If it had been ho t all over, I ’d have know n the w a ter w as circu lat ing b u t n o t as fast as it should.
*'¥ T N E V E R fails. If the ra d ia to r’s h o t all ■I over, look for a loose fan belt, a clogged ra d ia to r, too rich a m ixture, or p unk ignition. If i t ’s cool a t the bo tto m , som ething’s com pletely shu ttin g off th e w a te r.”
“ Yeah, an d fan belts cause m ost of the tro u b le ,” Jo e added. “ N in e -ten th s of th e cars th a t are b rought to the M odel Garage need new fan belts, d o n ’t they, G u s?”
T he m echanic agreed w ith a nod. “ A nd the tough p a rt of it is, loose fan belts cause a lo t of o th er troubles especially w hen the fan belt runs the generator as well as th e fan. I f it slips, th e generator slows dow n. T h a t m eans the generator doesn’t charge th e b a tte ry as fast as it sho u ld .”
“ G o sh !” exclaimed Crow ley shifting into second gear for the long pull up R ound M o u n tain . “ I never thought of th a t. A t th a t rate, you ought to check th e fan b elt every tim e you use the car.”
“T h a t w ou ld n ’t be a bad idea,” Gus agreed. " B u t i t ’s sim pler th a n th at. The fact th a t the fan belt drives th e generator m akes it easy. All y o u ’ve got to do is check th e am m eter reading n o w and then when all the lights are off. I f it reads low er th an usual, the first thing to look for is a loose belt. T h en a b o u t once every m onth let a service m an look a t the belt ju st to m ake sure i t ’s O. K.
“And an o th er th in g ,” Gus w en t on. “Loose fan belts and clogged ra d ia to rs a re n ’t the only things th a t'll m ake an engine o verheat. A w eak ignition coil can cause a lot of trouble too. If the coil is breaking dow n, the engine misses fire an d overheats.
” 1 OTS of tim es a high com pression m o to r -L^ will overheat because the engine gasket has blow n internally. T he cooling w a ter leaks into the m otor and the exhaust fumes escape th rough th e ra d ia to r.”
“M o to rs m ust be like people. As soon as they get sick th ey run a tem p e ra tu re,” C ro w ley grinned.
“R ight, and th a t’s w hy it pays to go over y our car now and then and get it in shape,” said Gus. “ A fter a hard w inter, a car needs some atten tio n . Flush the rad iato r, clean the honeycom bs by squirting a hose a t them from the inside, change to sum m er oil, go over the ignition system , check the carb u re to r, a n d clean up the m o to r generally.
“In oth er w ords,” he concluded “ give y o u r car a spring cleaning if you w a n t y o u r sum m er trip s to be free of tro u b le.”
FRANCE HAS WORLD'S
FASTEST DESTROYER
F ra n c e boasts possession of th e fastest to r ped o -b o at destroyer in the world. T h is vessel, the new Cassard, m aintained a speed of m ore th an fo rty -eig h t miles an h our for three hours in a recent test a t sea.
T I M E A L W A Y S M O V E S F O R W A R D — S O D O M E N W H O M A K E T H E M O S T O F I T ! T H I S C O U P O N I S A N I N V IT A T IO N A N D C H A L L E N G E T O M E N W H O A R E N O T S A T I S F I E D T O R E M A IN O N T H E S A M E J O B S — U N T I L T H E Y L O S E T H E M ! IN T E R N A T IO N A L C O R R E S P O N D E N C E S C H O O L S
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E nough N ational A d v e rtis e d 4 ‘Tomgrut' ’ te n n is s trin g f o r o n e r a c k e t (3 7 fo o tc o ilh C olors—W h ite, O ran g e. , G reen , fo r on/y 80c P ostpaid (cash w ith o rd e r)—»0c C. O. D . You also receive a com plete R e s trin g e r’s k W holesale P rice L ist of T om gut T ennis S trin g s. It iseasy toaa v eo n y o u r own ra c k e t and ea rnsplend id \ profit88trin«:ing fo r o th e rs . Give your ra ck e t a tr e a t \ —and your gam e a bo ost. Send fo r th e fam ous
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t* w r itte n in In ch — t h e hIImhI a d v e r-S
nnfc a c c e p te d n m a g a z in e . jidvi.Ttiseroents o f on e o r t w o in ch e s p ro d u ce re - I of m an y tim e s t h e i r c o s t f o r h u n d re d s p f com pd- j»r Individuals w h o h a v e n o v e ltie s , sc ie n tific o r m e- inleal e q u ip m e n t, to o ls, g a m e s , p u z z le s, e tc ., to sell, [fat firms looking fo r ag e n ts. Inch a d v e rtisem en ts like this ifll ftp. They pay well bec au se th ey are see n and re ad byW ide-awake men e v e r y m onth. In tere ste d Parties are
•I l«» ad d ress th e A d vertising D e p artm en t, P opu lar Science fir, HHI F ou rth A ve., N ew York, N . Y.
W H IC H C O N T R O L S Y O U ?
I r n c e says th at th e chem ical elem ents compos- j « limn’* body may be bou g h t for sixty cents at igli.ii m.icy shop. But the real p art o f you is the Itiiir, creative pow er within—it makes Y O U a MM, vital being.
it) tlit- pro p er use o f this creative, sleeping force
IUI,IU y o u , y o u can D O M I N A T E Y O U R LIFE M ASTER T H E C O N D I T IO N S W H IC H T|) R O U N D Y O U . T h e Rosicrucians have shown piiMiuls o f thinking m en and women how to use infinite power. Learn to direct the inner < e.iies of your mind.
T h i s F r e e B o o k E x p l a i n s
| In' Rosicrucians will send the S IN C E R E JiKllR a free copy o f the new book, " T h e PImIoiii of the Sages,” which tells how you may IM I ir a student o f these age-old tru th s. A ddress
tier (not a postcard o f curiosity) to: Scribe G . L. D .
ROIKRUOAN BROTHERHOOD
A M & R CSAN JO SE . CALIFORNIA
J u s t a r e m i n d e r — T h e R o a i c r u c i a n b r o t h e r h o o d is IVO IV -K ELlGiOC/S m oney ta k i n g p i c t u r e s . P r e p a r e q u ic k ly d u rin g lim e. A ls o e a r n w h ile y o u le a r n . N o e x p e rie n c e jm aiy. N e w e a s y m e th o d . N o th in g else lik e i t .I at o n ce f o r fre e b o o k . O p p o r t u n i t i e s in M o d e r n lu g r a p h y , a n d fu ll p a r t i c u l a r s . A M ER IC A N S C H O O L O F P H O T O G R A P H Y I i n c. 3 6 0 1 M ich ig a n A v e . C h ic a g o , U . S . A .
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