Two documents, both of which concern illumination studies, are presented. The first is a report on the illumination study at Hawthorne, which began Nov. 24, 1924 and ended April 30, 1927. In this study, candles of various lengths were introduced...
Federal project. Book-length manuscripts, research and project reports (1937-1941) and administrative records (1937-1941) generated by the WPA Historic Sites and Federal Writers' projects for Oklahoma during the 1930s. Arranged by county and by...