For over 70 years it has been our business to KNOW the products of the foremost chemical manufacturers here and abroad and to KNOW wherein each excels. By applying rigid tests in our laboratory we select from their best offerings to maintain the most complete chemical stock in America. Exacting chemists have long specified "E & A Tested Purity & Reagents" for analysis. Many insist upon having "E & A" label on all their chemicals. They KNOW why. Quality, service and price will please if on your next order you demand "E & A Chemicals." Eimer & Amend 18-19th St. Block at 3rd Ave. New York, N.Y.