On opening this imposing volume one wonders how there is enough material on the occupational aspect of tumors to fill it, but in actual fact there is little overlap with what one finds in the usual textbooks on tumors. Nearly 300 pages are devoted to tumors of the skin, and this section contains a mine of useful material. Under the heading Occupational Tumors of the Respiratory System one finds, in addition to statistical discussions on the increase of tumors of the lung, discussions of such matters as the influence of silica, asbestos, iron, arsenic, chromates, nickel carbonyl, gases and fumes, tar, pitch, liquid petrolatum, paraffin, soot and radioactive agents. Other sections are treated with similar thoroughness, and the whole book contains an invaluable mass of material for reference. There is a thorough bibliography.