“Picker Notebook” – Document Folder #4. Marked from Putnam Trade School, C.M.M.C., and A.C.S. What appears to be a complete course in calculating production values for a turn of the century Picking machine and yarn spinning for use in industrial textile mills. This vast book contains a combination of handwritten and typed pages, along with longhand calculations for various required needs. It includes a Lithograph of Picking Machine. Total 105 pages.