This is a carbon microphone used by Eugene Augstin Lauste during his experimentation with sound-on-film technology ca. 1904-1913. Microphone consists of a black wood platform raised on two wood blocks ...

Conventional wisdom has it that the solid state era in electronics began in 1948 with the invention of the transistor, or if you wish to split hairs, with the 1930s invention by the Russian [Oleg ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...

From the Massachusetts Eye and Ear Infirmary. Weille, Francis L. — Assistant surgeon, Massachusetts Eye and Ear Infirmary. Billings, Bruce H. For records and addresses of authors see "This Week's ...

Conventional wisdom has it that the solid state era in electronics began in 1948 with the invention of the transistor, or if you wish to split hairs, with the 1930s invention by the Russian [Oleg ...