These eight notebooks cover the periods 1887-1893 and 1894-1906. The first seven books contain transcriptions by Arthur E. Kennelly of material from the rough record books used by the experimenters in the Galvanometer Room. Included are notes, drawings, tables, and calculations regarding a variety of electrical experiments. The eighth book was used by Kennelly after he resigned his position at the West Orange laboratory. It also contains a one-page entry regarding Kennelly's return to West Orange to work briefly with Edison on x-ray experiments. For Kennelly's 57-page index to the experiments, click on the "List Documents" button below . Courtesy of Thomas Edison National Historical Park.