This is one of six notebooks that were probably begun on January 10, 1881. It contains notes on gas lighting and electricity by Charles L. Clarke, which appear to be related to Edison's proposed book on electric light and power. (See Menlo Park Notebook #184.) There are also notes on generators and conductors and eight loose pages that relate to "proportioning the cost of conductors." The label on the front cover is marked "C. L. Clarke." This book contains 284 numbered pages.

Blank pages: 1, 46-277, 280-284.

Courtesy of Thomas Edison National Historical Park.