Box 1: class experiments, 1911-1922, nos. 15-48, by Bedford and Stead. Class experiments, 1911-1939, nos. 54-89, by Bedford. Box 2: class experiments, 1911-1935, nos. 91-158, by Bedford, Stead and Roberts. Class experiments, 102.1-103.1. Box 3: class experiments, 103.5-105.2. Class experiments, 1907-1922, nos. 161-205, by Bedford and Searle. Box 4: class experiments, 1912-1925, nos. 213-266. Class experiments, 1919-1938, nos. A-H, by Bedford, Roberts, Reimann and Sharman. Box 5: class experiments, 1912-1937, nos. I-Z, by Bedford, Roberts, Sharman, Yates and Wynn-Williams. Elementary class experiments, undated. Box 6: class experiments, 1912-1927 and undated, by Bedford, Stead and Sharman.

Contributors are A.L. Reimann, J.K. Roberts, C.F. Sharman, G. Stead, C.E. Wynn-Williams, and E.L. Yates.