V O L U M E 2 1, NO. 2,
FEBRUARY1949
15 A
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. 0 4 8 .
American AO Optical COMPANY
Scientific Instrument Division Buffalo 15, New York
• SPENCER STEREOSCOPIC MICROSCOPES have been adopted by many industries for detecting adulterants and extraneous matter. Providing vivid, three-dimensional images and wide angle of view, they simplify identification and counting.
LABORATORY MICROSCOPES
SPENCER REFRACTOMETERS
POLARIZING MICROSCOPES
SPENCER COLONY COUNTER
SPENCER COLORIMETER
SPENCER MAGNIFIERS
For identification of bacteria and adulterants; examining structure and s t u d y i n g effect of processing.
For estimating sugar, casein, fat content . . . identifying liquids, oils, solids . . . determining purity.
For identifying starch grains, fillers, fibers, alkaloids and many crystalline materials and adulterants.
For proving sterility or estimating c o n c e n t r a t i o n of bacteria by counting colonies developed on test plates.
For determining ingredients or concentration where colored solutions are present or can be developed.
For sorting, and detecting extraneous matter in seeds, grains, etc. Innumerable uses in every plant.
Manufacturers of the SPENCER Scientific Instruments
