This scrapbook covers the period October 1877-December 1880. The notes and drawings are by Edison, Charles Batchelor, John Kruesi, and Samuel D. Mott. All relate to electric lighting, except for a note on the telephone, dated July, 1878, and a drawing of ore milling apparatus, dated April 20, 1880. Many of the drawings and notes were prepared for caveats or patent applications. On the back of some of the notes and drawings there is a page/volume number, indicating that they were removed from the sequence of numbered pages in Unbound Notebook, Vol.16. Some of the material in this book has also been copied into Experimental Researches, Vol.1. The book contains approximately 140 unnumbered pages. Courtesy of Thomas Edison National Historical Park.