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TO STICK OR GET STUCK
W e all l e a r n e d early in life t h a t "stickum" has no respect f o r persons or places. Fly-paper,, in spite of its name, would Just as soon entangle t h e fingers of a president as t h e f e e t o f a f l y . G l u e would as soon stick t o the b o y as to t h e p a g e s of t h e book. Frequently w e find t h a t it is just as important to prevent sticking as it is to make things stick. Thousands of dollars a r e spent e v e r y d a y f o r adhesives. Thousands o f dollars a r e lost e v e r y d a y because o f unwanted adhesion. Dow Corning Silicones possess unique properties t h a t h a v e p r o v e d v a l u a b l e in helping industry prevent un w a n t e d adhesion. A r e m a r k a b l y varied assortment of things v/ill not stick to a silicone surface. For e x a m p l e , DC M o l d Release Emulsion No. 3 5 wets and adheres t o metal, forming a h e a t stable parting surface t h a t keeps r u b b e r a n d other plastic materials from sticking t o t h e molds. Used in small quantities, it gives clean and e a s y release of tires a n d other r u b b e r products. It also reduces the number of rejects a n d the cost of mold cleaning. DC Mold Release Fluid is e q u a l l y v a l u a b l e to molders o f plastic products. In the f i e l d of low pressure laminating, D C 7 Silicone Compound prevents resin-bonded lami nates from sticking to the r u b b e r b a g s used in this process. A n d heat-sealing thermoplastics don't stick to Silastic*, so t h e use o f Silastic f o r pressure p a d s in sealing machines is g r o w i n g . In the baking industry, DC Pan G l a z e is preventing unwanted adhesion t o the tune of a saving esti m a t e d a t hundreds o f thousands of dollars a y e a r . It eliminates the n e e d for greasing pans b e f o r e e a c h baking—saves the cost of t h e p a n grease a n d the l a b o r required to a p p l y it—cuts the cost of keeping bakeries clean a n d sanitary. A n d the prevention o f unwanted adhesion is only one of t h e many useful properties of D C Silicone Products. Others include w a t e r repellency, retention o f properties over a v e r y w i d e t e m p e r a t u r e r a n g e , a n d g o o d electrical characteristics. For further information telephone the branch office nearest y o u , or w r i t e for C a t a l o g T l - 8 . ^TRADEMARK FOR DOW CORNING SILICONE RUBBER
DOW C O R N I N G C O R P O R A T I O N MIDLAND, MICHIGAN New York · Chicago · Cleveland · Los Angeles • In Canada: Fiberglass Canada, Ltd., Toronto In England: Albright and Wilson, Ltd., London Γ ~τ ' — "" 1
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T h e 1947 crop of t u n g n u t s a n d t h e l a u n c h i n g of the S . S . Loide-V'enezuel-a a t t h e Ingalls Shipbuilding Corp.'s P a s c a goula, Miss., s h i p y a r d m a y not a t first t h o u g h t appear t o h a v e m u c h i n comm o n . T o Mississippians b o t h e v e n t s were occasions for rejoicing since t h e b u m p e r 1947 c r o p exceeded t h a t of a n y o t h e r y e a r in t h e s t a t e , a n d t h e s h i p w a s t h e h u n d r e d t h l a u n c h e d in Mississippi i n less t h a n 10 y e a r s . T o t h e chemist a n d chemical engineer t h e link is t h a t of a "home-grown, home-processed, and home-used" chain. T h e m a r i n e p a i n t used o n t h i s s h i p a n d 29 o t h e r s built b y Ingalls in Mississippi was provided b y t h e M c l l h e n n y P a i n t a n d Varnish C o . of L a k e . T h e crude t u n g oil processed b y M c l l h e n n y i n t o a vehicle for t h i s p a i n t came from t h e Wade t u n g oil mill a t R i c h t o n . T h e n u t s crushed b y W a d e were, of course, Mississippi grown.
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| T h e S a c r a m e n t o Section of t h e A C S 1 publishes a m i m e o g r a p h e d m o n t h l y I b u l l e t i n called The Condensate. I t is ! w r i t t e n in a light, interesting, e a r t h y I style. W e would like t o q u o t e from I t h e N o v e m b e r issue to show a n e w a p I p r o a c h t o t h e value of AMERICAN I
CHEMICAL SOCIETY membership.
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T h e y say t h a t t o properly t r a i n a d o g y o u have t o know more t h a n t h e d o g . W e used to'fool M i k e (a pondero u s pointer) i n t o enhanced h u n t i n g a c t i v i t y b y whistling like a quail. T h e n s o m e dope did i t on t h e radio. Mike k n e w t h a t t h e r e was n o quail in t h a t b o x a n d developed a critical e a r . P e r h a p s t h e r e is a lesson in this for chemi s t r y ^ teachers. If y o u r pupils a r e «catching u p w i t h you, pull out in front b y joining t h e A C S .
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1 H e r e a r e m o r e definitions from t h e ! " D e v i l ' s D i c t i o n a r y / ' reprinted from I t h e "Collected Writings of Ambrose 1 B i e r c e , " published b y t h e Citadel Press, S N e w York. S G E O L O G Y . T h e science of t h e earth's SI crust—to which, doubtless, will be I a d d e d t h a t of i t s interior whenever a II m a n shall come u p garrulous o u t of J a well. T h e geological formations of I t h e globe already noted a r e cataI logued t h u s : T h e P r i m a r y , or lower I one, consists of rocks, bones of mired I mules, gas pipes, miner's tools, I a n t i q u e s t a t u e s m i n u s t h e nose, || Spanish doubloons, a n d ancestors. || T h e Secondary is largely m a d e u p I of red worms a n d moles. T h e T e r ! t i a r y comprises railway tracks, p a t -
e n t pavements, grass, snakes, mouldy boots, beer bottles, t o m a t o cans, intoxicated citizens, garbage, a n archists, snap-dogs, a n d fools'. GRAVITATION.
T h e t e n d e n c y of
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bodies to approach o n e another with a strength proportioned t o t h e q u a n t i t y of m a t t e r they contain— t h e q u a n t i t y of m a t t e r t h e y contain being ascertained b y the s t r e n g t h of their tendency to approach one another. ' This is a lovely a n d edi fying illustration of how science, h a v i n g m a d e A proof of B , makes Β t h e proof of A. L E A D . A h e a v y blue-gray m e t a l much used in giving stability t o light lovers—particularly t o those who love not wisely b u t other m e n ' s wives. Lead is also of great service a s a counterpoise t o a n a r g u m e n t of such weight t h a t it" turns t h e scale of debate t h e wrong way. An inter esting fact in t h e chemistry of inter national controversy is t h a t a t t h e p o i n t of c o n t a c t of two patriotisms lead is precipitated in great q u a n tities. LEARNING. T h e kind of ignorance distinguishing t h e studious. M A G N E T . Something acted upon b y magnetism. MAGNETISM. S o m e t h i n g acting upon a m a g n e t . T h e t w o definitions i m m e d i a t e l y foregoing are condensed from t h e works of one t h o u s a n d eminent scientists, who h a v e il luminated t h e subject w i t h a great w h i t e light, t o t h e inexpressible a d v a n c e m e n t of h u m a n knowledge. M O L E C U L E . T h e ultimate, indivisible u n i t of m a t t e r . I t is distinguished from the corpuscle, also t h e u l t i m a t e , indivisible u n i t of m a t t e r , b y a closer resemblance t o t h e atom, also t h e ultimate, indivisible unit of m a t t e r . T h r e e great scientific theories of t h e s t r u c t u r e of t h e universe a r e t h e molecular, t h e corpuscular, a n d t h e atomic. A fourth affirms, with Haeckel, t h e condensation or p r e cipitation of m a t t e r from ether— whose existence i s proved b y t h e condensation or precipitation. T h e present t r e n d of scientific t h o u g h t is toward t h e t h e o r y of ions. T h e ion differs from t h e molecule, t h e cor puscle, a n d t h e a t o m in t h a t i t is a n ion. A fifth t h e o r y is held b y idiots, b u t it is doubtful if they know a n y m o r e a b o u t the m a t t e r t h a n t h e others. PHILOSOPHY. A r o u t e of m a n y r o a d s leading from nowhere t o nothing. (To be continued)
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CH EMICA L A N D E N G I N E E R I N G
NEWS
