Early last year the West German firm of Peter Meyns bought sodium bichromate and potassium bichromate (used in tanning leather) and paraffin wax from the U.S., had the chemicals shipped to West ...

Monochromatic light must be used for polarimetrie readings, but with the quartz wedge saccharimeter bichromate-filtered ... in the form of an electric sodium lamp, and its introduction has led ...