This is an Ernst Presser selenium photocell used by Eugene Augstin Lauste during his experimentation with sound-on-film technology ca. 1904-1913. Lauste used these cells in recording and reproducing ...
This is a Bidwell selenium photocell used by Eugene Augstin Lauste during his experimentation with sound-on-film technology ca. 1906-1914. Lauste used this cell in recording and reproducing sound.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback