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PETERSON ^/ΜΜΦΜΕΜΛ^
DRIERITË
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Ξ Ί Ο s-s 3 SVD-SQ ι ηοιτ-sanos-s 3svo-sainon-scino "The Versatile IBasiccaTtî" For D r y i n g — S O L I D S — L I Q U I D S — G A S E S F o r seven y e a r s s e r v i n g t h e INSTITUTIONS—INDUSTRIES LABORATORIES—PLANTS in t h e s o l u t i o n of t h e i r d r y i n g p r o b l e m s Write for Literature
W. A. HAMMOND DRIERITE COMPANY Yellow Springs, O h i o
ϋ&Ρ*A I R INSTANTLY
INDUSTRIAL L A B O R A T O R Y TABLE 6610
V E L O C I T I E S DIRECTLY
F a m e d for Q u a l i t y for Fifty Y e a r s
ACCURATELY
For half a c e n t u r y , P e t e r s o n h a s s t u d i e d t h e r e q u i r e m e n t s of l a b o r a t o r y w o r k e r s f r o m t h e c h a n g i n g t e c h n i q u e e m a n a t i n g from t h e c l a s s r o o m to t h e last w o r d in actual w o r k i n g conditions. Write for T h a t ' s w h y this f u r n i t u r e h a s PETERSON'S a n a u r a of a u t h e n t i c i t y to it Furniture Catalog. Gratis of course. which its quality proves through the years.
with this V E L O M E T E R
"τΜΐφφύ^>
Ruggedly constructed — expertly calibrated — the " A l n o r " indicates air velocities directly on a scale in feet per minute without timing or calculation. This Velometer will also indicate pressures in inches of water when provided with suitable jets. Accuracy within 3 % of full scale readings guaranteed. Range includes 15 to 24,000 F.P.M.
ILLINOIS
TESTING
Write for Bulletin No 2 448-D
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LEONARD PETERSON
LABORATORIES, INC.
4 2 9 N. LaSalle St.
1222-34 F U L L E R T O N A V E
Chicago, Ill.
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C H I C A G O , U . S. A .
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S u r e we're bragging, b u t - — w h e n companies like duPont, Socony-Vacuum, Shell O i l a n d Warner Quinlan use our tachometer w e ' v e got a right to b e proud. Portable — less than 2 lbs. in weight, Jones Hand Tachometers a r e ideal for speed a n d rating checks on revolving platens, generators, turbines a n d motors of all types. Write
today for further in formation.
JONES «MOTROLA 432
FAIRFIELD
STAMFORD,
AVENUE,
CONN.
Drain residual water from t h e evaporator of your Barnstead Still every day, To remove concentration of impurities. If your still Is electric or gas operated, make sure that there is always enough water flow ing in t o the still t o prevent any b u r n i n g o u t of t h e heating elements. And always k e e p the interior of your still clean. If you do these three sim p l e things, your Barnstead Water Stills should produce a consistent high grade of distilled water for years and years without trouble.
IMPORTANT! i%€lv©r,Ci©iKg C ^ p ^ mWrMt m a k e a t r i p t& ill© U- S. C e n s o r s Office S€P
€JE&®îmgi simt®& mdiïï3ë&mc DECEMBER
10, 19 42
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STILL&STERILIZER CO. Inc.
19 L A N E S V I L L E T E R R A C E , F O R E S T H I L L S , B O S T O N ,
MASS.
1605
