This notebook was used by Absalom M. Kennedy during February-March 1914. The entries pertain to experimental recorders and amplifiers. The initial entries describe a series of experimental recorders produced by Harry W. Doyle. Each entry indicates the details of construction and the manner in which the parts were sealed and fastened together. Additional information about these recorders can be found in the unselected notebook, N-14-01-27.2. Following these entries is a daily record of experiments and tests performed by various laboratory staff on phonograph recorder and reproducer parts. These include tests with various distances, amplification speeds, types of recorders, and positions of recorders and voices. Some of the entries report results, such as loudness and quality of recorded tone. The notes indicate that the experiments were done by Archie D. Hoffman, Harry E. Humphrey, Miller Reese Hutchison, Alexander N. Pierman, and employees named Harper and Taylor (probably Henry A. Taylor). The front cover is labeled \"Recording Experiments.\"" The inside front cover is inscribed \""Recording and Amplifying.\"" The pages are unnumbered. Approximately 25 pages have been used."