p H I n d i c a t o r s . F o l d e r offering p H indica t o r s i n w a t e r s o l u b l e f o r m from which a aolu· t i o n of a u t o m a t i c m i d p o i n t r a n g e equilibrium c a n b e o b t a i n e d b y weighing c o r r e c t amtount a n d s t i r r i n g i n distilled w a t e r àa needed.
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HABTMAN-LBDDON CO., INO.
F o r f u r t h e r i n f o r m a t i o n o n a n y i t e m m e n t i o n e d h e r e , fill o u t c o u p o n
below.
Alloys, D i e . B r o n z e alloys for forming a n d drawing dies described in bulletin with i n f o r m a t i o n on d i e d e s i g n a n d m a c h i n i n g p r o -
Fire* F o g s y s t e m of fire p r o t e c t i o n for h i g h l y h a z a r d o u s a r e a s w h e r e v e r y flammable l i q u i d s and solids a r e involved discussed in 28
cedures.
pages. "AUTOMATIC" SPRINKLER CORP. OF AMERICA. L10
AMPCO M E T A L , I N C .
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Alloys, H i g h - T e m p e r a t u r e . " H a y n e s A l loys for H i g h - T e m p e r a t u r e S e r v i c e , " 8 7 - p a g e b o o k c o n t a i n i n g all a v a i l a b l e d a t a o n p r o p e r ties compiled b y National Defense Research C o u n c i l , N a t i o n a l A d v i s o r y C o m m i t t e e for Aeronautics, and manufacturers, with graphs, tables, a n d photomicrographs. HAYNES STELLITE C O .
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B a l a n c e s , A n a l y t i c a l . C a t a l o g b u l l e t i n of t y p e j of b a l a n c e s for high precision t h r o u g h r o u t i n e a n d s t u d e n t uses w i t h d e t a i l e d d e s c r i p t i o n of d r u m chain, n o t c h e d b e a m , h o r i z o n t a l vernier, w e i g h t g r i d , a n d m a g n e t i c damper features. VOLAND AND S O N S . L3 B r a k e s , Fractional Horsepower. Bulletin describing a n d illustrating magnetic disk b r a k e s f o r fractional h o r s e p o w e r a p p l i c a t i o n . STEABNS MAGNETIC MFG. Co.
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C r y s t a l M o d e l s . L i s i t n g of 2 2 5 m o d e l s a v e r a g i n g 1.5 t o 2 inches i n size classified according to isometric, tetragonal, hexagonal (and its rhombohedral groups), orthorhombic, m o n o c l i n i c , a n d triclinic s y s t e m s . B U R R LEE POTTERY.
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D e m i n e r a l i z e r , L a b o r a t o r y . U n i t 2 5 b y 11 b y 2 3 i n c h e s i n size p r o d u c i n g c h e m i c a l l y p u r e w a t e r a t low c o s t . P E R M U T I T C O . L6 D i a m y l p h e n o l . B o o k l e t of 24 p a g e s d e s c r i b i n g p r o p e r t i e s , uses s u c h as p r o d u c t i o n of a d d i t i v e for l u b r i c a t i n g oils, p l a s t i c i z e r s , a n d r u b b e r chemicals, a n d r e a c t i o n s of d i a m y l p h e n o l , w i t h b i b l i o g r a p h y of 104 references. K O P P E R S Co., I N C . L7 D r y i n g T i m e R e c o r d e r . U n i t for m e a s u r i n g d r y i n g c h a r a c t e r i s t i c s of p a i n t s , v a r n i s h e s , e n a m e l s , d r y i n g oils, a d h e s i v e s , e t c . , offered in\folder. INC.
H E N R Y A. G A R D N E R LABORATORY,
L8 E q u i p m e n t , Chemical, Acidproof ceramic filters a n d containers, pipe a n d fittings, coolers a n d c o n d e n s e r s , t o w e r s a n d p a c k i n g s , fume washers, t a n k linings, hydrochloric acid absorbers a n d plants, cements, and coatings cataloged. M A U R I C E A . K N I G H T . L9 F i r e P r o t e c t i o n . D e s i g n a n d a p p l i c a t i o n of
Flotation Machine. D e t a i l e d discussion a n d i l l u s t r a t i o n of flotation m a c h i n e for which dynamically balanced assembly adj u s t a b l e t o a n y p l a n t , simple 3-point a d justm e r i t , n o l o s s d u r i n g s h u t d o w n s , a n d special frotli flow m e t h o d a r e c l a i m e d . GALIGHER Co. L11 G-lues, P a c k a g i n g . D a t a s h e e t o n g l u e s for c a s e sealing, labeling, sealing waterproof papers, etc. B O R D E N C O . L 12 H e a t E x c h a n g e r . Aftercoolers for w h i c h v e r y h i g h r a t e s of h e a t t r a n s f e r w h e n cooling air or o t h e r fixed g a s e s a r e c l a i m e d , i n c o r p o r a t i n g coils of s m a l l d i a m e t e r t u b e s w h i c h e l i m i n a t e baffles o r s h a r p t u r n s . GRAHAM Mre used in c o n j u n c t i o n w i t h cable or chain hoisting.
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S h r e d d i n g M a c h i n e r y . Sectional a n d in s t a l l a t i o n i l l u s t r a t i o n s of s w i n g h a m m e r s h r e d d e r s f o r s u g a r , p u l p a n d p a p e r , in s u l a t i n g m a t e r i a l , t u r p e n t i n e and_ rosin,,. chemical, a n d o t h e r m a n u f a c t u r e r s , w i t h con s t r u c t i o n d e s c r i b e d i n d e t a i l in 4:8-page catalog JEFFREY MFQ. CO. ISO S t a n d a r d s . C a t a l o g of s t a n d a r d s o f mass» v o l u m e , a n d l e n g t h for official, commercial, a n d scientific use a s well a s balances, inspec tion k i t s , a n d a s s o c i a t e d e q u i p m e n t . W, fc L. E . G U R L E Y .
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S a m p l e r . T w e n t y p a g e s w i t h m a n y illus t r a t i o n s OD m e c h a n i c a l s a m p l e r d e s i g n e d to o b t a i n s a m p l e s a c c u r a t e l y representative from s t r e a m s of m a t e r i a l s s u c h as ores.
S e a l s , P u m p . M e c h a n i c a l seals b u i l t into centrifugal p u m p s for p e t r o l e u m products described i n folder. W O R T H I N G T O N PUMP*
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P u m p s , C e n t r i f u g a l . T w e l v e pages illus t r a t i n g a n d d e s c r i b i n g c e n t r i f u g a l p u m p s for p u l p a n d p a p e r i n d u s t r y such a s pulp, milkof-lime, special d u t y , screw feeder, barking, w a t e r s u p p l y , c o n d e n s a t e , d o u b l e case boiler feed, h y d r a u l i c p r e s s , w h i t e w a t e r s e r v i c e , and g e n e r a l p u r p o s e t y p e s . B Y R O N J A C K S O N CO. L24 R a d i o c h e m i c a l E q u i p m e n t . C a t a l o g of 38 p a g e s offering scalers, p r e s e t counter, scaler c a r t , p r i n t i n g i n t e r v a l t i m e r , s a m p l e changers, r a d i a t i o n s u r v e y m e t e r , p a c k a g e d radio chemicals, l a b o r a t o r y m o n i t o r , preamplifier, l e a d shields, G - M t u b e s , absorbers, planc h e t s , lead c o n t a i n e r s , r a d i o c h e m i c a l services,
YALE & T O W N E M F G . Co.
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P r e s s , L a b o r a t o r y . T w e n t y - t o n oapacity, s e l f - c o n t a i n e d press for b r i q u e t t i n g , tensile t e s t i n g , e x t r a c t i n g , m o l d i n g , laminating» etc, i n l a b o r a t o r y or p r o d u c t i o n work. HYDRA tFLio P R E S S M F G . C O . L 21 P r o t e c t i v e C o a t i n g . P e r i o d i c a l , Advance Headlines for the Protective Coating Indxistry, first n u m b e r of w h i c h gives d e t a i l s on antiflooding a g e n t , d r i e r , oleoresinous finishes, a n d c o a t i n g s clinics. A D V A N C E S O L V E N T S ά
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S t e e l P l a n t . B r o c h u r e of 2 6 pages offering d e s c r i p t i o n of t o u r of mills a n d p l a n t s , in— ' eluding t h e o p e n h e a r t h d e p a r t m e n t ; , 120a n d 2 0 6 - i n c h mills, g r i n d i n g a n d t r i m m i n g s h o p s , flanging d e p a r t m e n t , s o d i u m n y d r i d e descaling p l a n t , h e a t t r e a t i n g departments a n d f a b r i c a t i n g divisions. LTJKENS STBBL l 5 2 Co. T e s t i n g . P r i c e list for t e s t i n g s e r v i c e s , with* large s e c t i o n s d e v o t e d t o bacteriological, chemical, e n g i n e e r i n g , food, leather, a n d tex tile t e s t s a n d t o specialized services such a s certification of p r o d u c t , consumer panels, p h o t o g r a p h y , etc. CO., INC.
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