This folder contains dated notes and drawings from 1908, as well as undated material possibly from the same year. Included are items by Edison, Ludwig F. Ott, George E. Small, and other employees pertaining to storage batteries, phonographs, and Edison's planned concrete house. The majority of the documents are Small's notes regarding measurements, patterns, and molds for the house.
Approximately 30 percent of the documents have been selected. A sample of the concrete house material has been selected, consisting primarily of items providing overall dimensions for the house and its foundation. The unselected documents include drawings and calculations by Small regarding individual molds for the house and several battery drawings by Ott.
