This notebook was used by Charles T. Dally during September-October 1918 for numbered experiments on disc blanks. There are also a few separate pages of notes by Edison, along with one note by Edison inserted into the book. The entries describe how each disc performed after being varnished, pressed, printed, or dropped. They frequently indicate numbered "mixes," some of which are identified as "TAE" mixes. The research in this book is representative of the work in the thirteen other books in the group. The front cover is labeled "Disk Records No- 2 Book." The pages are unnumbered. Approximately 120 pages have been used. Courtesy of Thomas Edison National Historical Park.