Trade Secret: An “Accounting” machine is different from an “Adding” machine!
Tag Archives: Debold Gallery Bloomfield NJ old items photos historical
Thomas Edison – 1909
Scientific American – February 27, 1909. The latest Edison Phonograph
Images, Documents, Objects from the Debold American Gallery Archives.
Trade Secret: An “Accounting” machine is different from an “Adding” machine!
Scientific American – February 27, 1909. The latest Edison Phonograph