were designed for the treatment of ores in economical quantities of from five hundred pounds to three tons, and used entirely for purposes of instruction. They are now known as the John Cummings laboratories, in memory of one who for many years was treasurer of the Institute and one of its most devoted friends. They now occupy the entire basement of the Rogers Building, and include laboratories for milling, concentrating and smelting ores, as well as for testing them by assay and by blowpipe. The development of these laboratories from the small beginnings of 1871 has been mainly due to the efforts of Prof. R. H. Richards, past president of the American Institute of Mining Engineers, whose contributions on methods of ore dressing are well known to mining engineers. The staff of this department also includes Prof. H. O. Hofman, well known for his researches in metallurgy.
Three Stamp Mill in Mining Laboratory
Mention should here be made of the department of geology, which is under the direction of Professors Niles, Crosby and Barton, and which now occupies commodious quarters comprising the greater part
