This notebook covers the period January-February 1880. The entries are by Charles L. Clarke and relate primarily to copper conductors for electric lighting. The name "Clarke" is inscribed on the inside front cover. The book contains 284 numbered pages. Pages 94-265 consist of skeleton tables that were never filled in. These have not been selected.
Blank pages: 68-69, 266-273. Courtesy of Thomas Edison National Historical Park.