36 A
ANALYTICAL
CHEMISTRY
LABORATORY STIRRERS with COMPLETE Speed Control
Klett Photometers
GEAR DRIVE STIRRER The heaviest gear drive stirrer of the P A L O line, incorporating all the features of power, ruggedness and durability — with the addition of reduction gears giving high torque at low speeds.
Model 7609C
5
Klett-Summerson Photoelectric Glass Cell Calorimeter No. 900-3
59."
Write for descriptive Bulletin 4404y.
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1/18 H P m o t o r . T a b l e - t o p speed c o n t r o l r h e o s t a t , H i g h speed s h a f t t o 5000 R P M . Low speed s h a f t t o 833 R P M w i t h a m a x i m u m t o r q u e of 3.0 i n . l b s . • 5/16" t r u e r u n n i n g c h u c k . • S t a i n l e s s steel m o u n t i n g r o d . • Can be used with a n y laboratory support, e 110 volts, AC-DC. This is just one of our complete line of high quality labora tory stirrers—of all kinds, for all purposes. Tell us your needs. See Your Regular Supply Dealer or Write Directly to Us.
The Klett fluorimeter
T^AI^-MYERSLNC 81 READE STREET
·
NEW YORK 7, N.Y.
No. 2070
Designed for t h e rapid a n d accurate d e t e r m i n a t i o n of t h i a m i n , riboflavin, a n d other substances which fluoresce i n s o l u t i o n . T h e s e n s i t i v i t y a n d s t a bility are s u c h t h a t i t h a s been found particu larly useful i n determining very s m a l l a m o u n t s of t h e s e substances.
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KLETT SCIENTIFIC PRODUCTSELECTROPHORESIS APPARATUS · BIO-COLORIMETERS GLASS ABSORPTION CELLS · COLORIMETER NEPHELOMETHRS · GLASS STANDARDS · KLETT REAGENTS
Kktt
TRANSPARENT (Vitreous Silica or Quartz Glass) • Because of its extraordinary trans parency to ultra-violet and infra red rays, Vitreosil apparatus is par ticularly suitable for metallurgical investigations, physical, optical and electrical research where tempera ture conditions render the use of glass inadvisable. Transparent Vitreosil is unaffected by thermal shock, halogen gases and acids (except hydrofluoric and phos phoric) at any concentration or temperature . . . it is extremely hard, free from distortion and an excellent electrical insulator. • Many items of special labora tory equipment can now be sup plied in Transparent Vitreosil. • Write for bulletins describing the appli cations of Transparent Vitreosil to research and analytical work.
Manufacturing C o .
179 E A S T 8 7 T H S T R E E T , N E W Y O R K , Ν . Υ .
The THERMAl SYNDICATE
