24 A
ANALYTICAL
CHEMISTRY
Guardians of Purity and PROFITS Products whose purity and quality have been safeguarded by rigid laboratory control are the ones that continue to bring profitable prices. Protect the quality of your products with Spencer Optical Instruments. One or more of those shown here have applications in your plant. For complete information write dept. 048.
American
Optical
COMPANY
Scientific Instrument Division Buffalo 15, New York
. SPENCER STEREOSCOPIC MICROSCOPES h a v e b e e n a d o p t e d b y m a n y i n d u s t r i e s for d e t e c t i n g adulterants a n d extraneous m a t t e r . Providing vivid, t h r e e - d i m e n s i o n a l i m a g e s a n d w i d e a n g l e of v i e w , t h e y simplify i d e n t i f i c a t i o n a n d c o u n t i n g .
LABORATORY MICROSCOPES For identification of bacteria and adulterants ; examining s t r u c t u r e a n d s t u d y i n g effect of processing.
SPENCER REFRACTOMETERS For estimating sugar, casein, fat cont e n t . . . identifying l i q u i d s , oils, solids . . . determining purity.
POLARIZING MICROSCOPES For identifying s t a r c h g r a i n s , fillers, fibers, a l k a l o i d s a n d many crystalline materials and adulterants.
SPENCER COLONY COUNTER F o r p r o v i n g sterility or estimating c o n c e n t r a t i o n of bacteria b y counting colonies d e v e l oped on test plates.
SPENCER COLORIMETER For determining ingredients or concentration where colored solutions are present or can be developed.
SPENCER MAGNIFIERS For sorting, and detecting extraneous matter in seeds, grains, etc. I n n u m erable uses in every plant.
Manufacturers of the SPENCER Scientific Instruments
