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contributions to bur knowledge of addition and condensation processes, while among the important works of Dr. Lengfeld and others of the staff are the obtaining of thiamines and other organic sulphur salts, studies upon rearrangement of molecules in compounds, hydrolitic dissociation of salts, and researches upon amydo-phosphoric acid, titanium and zirconium compounds. So far, however, nothing has been done in physical chemistry. No courses in that direction have been offered, and it is probable that none will be for some time to come. The department has no journal, but the results of the researches conducted here are published in the more important chemical periodicals, particularly in the American Chemical Journal, the Proceedings of the French and German Chemical Societies, Liebig's Annalen, and the Compte Rendu.

The Ryerson Physical Laboratory is unquestionably the best equipped and most handsomely finished building on the campus. Built by Mr. Martin A. Ryerson, of Chicago, to the memory of his father, Martin Ryerson, it was completed January 1, 1894. Externally individual and striking, its general character and