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...
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...