On December 7, 1877 Thomas Edison demonstrated his phonograph at the New York City offices of the nation's leading technical weekly publication, Scientific American. The following report set off ...
On December 7, 1877, Edison conducted the first ... and waxes for disc and cylinder phonograph records, nickel-iron alkaline electric storage batteries, and improvements to the manufacture of Portland ...
Results that may be inaccessible to you are currently showing.
Hide inaccessible results
Feedback