This notebook, which covers the period October 1888-July 1889, is a continuation of N-88-09-28. It contains transcriptions by Arthur E. Kennelly of material from the rough record books used by experimenters in the Galvanometer Room. There are notes, drawings, tables, and calculations regarding a variety of electrical experiments, including tests of meters, octopolar dynamos, galvanometers, phonograph batteries, insulation, and the carrying capacity of various electrical conductors. There are physiological experiments using gasoline on bacteria and earthworms and electrocution experiments witnessed by Edison, Harold P. Brown, and members of the New York State Commission on Humane Capital Punishment. Also included are notes regarding the Brooklyn electrical distribution system; electrical resistance measurements for 39 employees of the laboratory and 220 employees of the Edison Phonograph Works, with information regarding their age, weight, and height; and theoretical notes concerning physics, electricity, and mathematics. Among the experimenters whose work appears in this book are E. C. Boynton, T. F. Lawrence, Theodore Lehmann, and Charles Wirt. At the end of the book is a subject index; it appears at the beginning of the book in the digital edition. The front cover is marked "I" and "1888-1889." The book contains 168 numbered pages. Graphs and other items have been pasted into the book. Courtesy of Thomas Edison National Historical Park.