University of Virginia Library

TO THE CHEMICAL LABORATORY.

Pickhardt & Kutroff, New York—Auramine, New Naphthol Yellow, Helianthine, and
other Tinctorial Products.

F. Gutekunst, Philadelphia—Specimens of "Phototype" Printing (from Gelatine).

Dr. J. P. Battershall, New York—Samples of Chinese Adulterants for Tea.

Paul Weidinger, New York—Slag (Phosphatic) from the Thomas-Gilchrist Process of
Steel-making.