“ee through hot pipes, work from 25 to | --An interesting account of the Edison, Bell, and Tain- 150 lbs. pressure. Parts removable | tO? apparatus for ths mechanical reproduction of speech, Send to American Watch Tool Co., Wal- ELECTRO MOTOR, SIMPLE, HOW TO without disconnecting, also inter. |…
Internet Archive · Public domain (published before 1931). Free to use for anything.
