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Need An Experienced Worker Your Laboratory?
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Consider Coleman Spectrophotometers. T h e y ' r e workers.
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o u t m o r e a n a l y t i c a l w o r k , a t l o w e r cost, t h a n a n y other l a b o r a t o r y tool m a d e t o d a y . E x p e r i e n c e ? T w e l v e l o n g y e a r s o f i t , in l a b o r a t o r i e s a l l o v e r t h e w o r l d . Twelve y e a r s o f association w i t h t h e highest authorities in a n a l y t i c a l chemistry. Twelve y e a r s o f d e p e n d a b l e service to the a n a l y t i c a l chemist, t o t h e l a b o r a t o r y t e c h n i c i a n . That's w h y you'll find no " p r i n t e d circuits" o r unstable vacuum t u b e
COLEMAN SPECTROPHOTOMETERS OPEN THE DOOR TO PRECISION FLAME PHOTOMETRY . . . . A T MINIMUM COST.
e l e c t r o n i c s in C o l e m a n S p e c t r o p h o t o m e t e r s . E x p e r i e n c e t a u g h t us l o n g a g o , t h e f o l l y o f " g a d g e t r y " in l a b o r a t o r y i n s t r u m e n t a t i o n . T h a t ' s w h y y o u will f i n d a w h o l e , b r o a d l i t e r a t u r e o f a n a l y t i c a l methods d e v e l o p e d a n d published, with direct reference to Coleman S p e c t r o p h o t o m e t e r s , b y t h e h i g h e s t a u t h o r i t i e s in t h e i r f i e l d s . That's the value y o u b u y w h e n y o u b u y Coleman Spectrophotometers: D e p e n d a b i l i t y , Precision a n d Economy, P R O V E D BY EXPERIENCE.
Ask for a demonstration in your lab or write for Bulletin Β-232.
At a saving of hundreds of dollars the owner of a Coleman Spectrophotometer can a d d the speed, precision and versa tility of Flame Photometry to his l a b o r a t o r y m e t h o d s . The C o l e m a n F l a m e Photometer was designed to include the use of Coleman Spectrophotometers as external measuring units. Write for Flame Photometer Bulletin B-231
Coleman Spectrophotometers Coleman Instruments, Dept. A , 3 1 8 Madison St., M a y w o o d , III. For further information, circle number 31 A on Readers' Service Card, page 59 A
VOLUME
2 8, N O . 3, M A R C H
1956
31 A
