"Investigative tests - material submitted to the Department claimed to be of novel or superior value for its use, or material which has developed defects in manufacture or service."--Page 11.

Examination of three Springfield rifles which failed during Navy target practice --Broken bolt from .45 caliber accuracy gun -- Supplementary report on broken bolt from .45 caliber accuracy gun -- Investigation of two United States rifles, caliber .30, model of 1917, Nos. 1082820 and 100187, which failed at Camp Dodge -- Examination of pintle-bearing casting from 3-inch field gun -- Investigation of the castings produced by the centrifugal process -- Examination of 75-millimeter shells -- Examination of castings having different manganese content -- Investigation to determine the effect of phosphorous upon the physical properties of cast steel -- Examination of armor plate from Rock Island Arsenal -- Determination of the effect of maximum temperature of heating on the retention of the transition constituents of chrome-nickel steel -- Investigation of chrome-nickel steel -- Supplementary investigation of chrome-nickel steel -- Experimental work on cast tubes and jackets for the 75-millimeter field gun -- Examination of excess metal from accepted gun forgings -- Experimental data obtained on the Charpy impact machine -- Report of test of two twist drills for the Panama Canal, Purchasing Department, Washington, D.C.