This notebook covers the period December 1897-January 1898. It is the third of four books used by an unidentified experimenter to record lamp tests, nos. 1-302. This book contains tests, nos. 301-302. Each test lists the amperes, volts, and candlepower used. The front cover is marked "Orders." The book contains 200 numbered pages of skeleton tables, but only the first two pages were used.

Courtesy of Thomas Edison National Historical Park.