This notebook was used by Edison during January and February 1912. Included are notes on "experiments on sound with different phonos" and various recording devices, horns, and studio furnishings. Also included are notes on surface cracks and dirt on celluloid disc and blue amberol records. One notation indicates that "perhaps we shall have to abandon the blue & only use grafite." Many of the entries provide Edison's reactions to individual recordings, some released by the Victor Talking Machine Co. and many produced by Thomas A. Edison, Inc. These non-experimental entries begin a series of notebooks containing extensive "comments on disc records," with N-12-04-17.2 next in the sequence. The recordings evaluated in this notebook reproduce opera and popular music; well-known Victor artists include Enrico Caruso and Al Jolson. The book contains one note added by an archivist in 1973. The front cover is labeled "Comments on Disc Records No. 1" and "Ent." The pages are unnumbered. Approximately 100 pages have been used.