On account of the military roster, we were assigned for examination one company a day, averaging 135 men. Each member of the board examined his third of this number, and any men found with signs in heart or lungs deviating from the normal were held up for combined study by the board. In beginning our work we had no very definite plan to follow, except that our instructions, as to what would disqualify from active service or require a recommendation for special service, were plainly set forth in the very definite and excellent circulars, Nos. 20 (for tuberculosis) and 21 (for cardiovascular conditions) of the War Department, Surgeon-General's Office. METHODS The men in each company were assigned to us in groups of ninety in the afternoon, reporting at 1:30 p. m., and the remaining forty or forty-five men next morning, reporting at 10 a. m. The holdups from the previous