The Three-Electrode Vacuum Tube as Applied to the Talking Motion Picture

Edward W. Kellogg

The Phonograph was invented in 1876 and was a household device by 1888. The Motion Picture was invented in 1889 and became a recognized means of public entertainment by 1895. The one is a record of what we hear and the other a record of what we see.

Print ISSN
Published
1928-09
Content type
Original Research
DOI
10.5594/J00757