Special to The New York Times. New York Times subscribers* enjoy full access to TimesMachine—view over 150 years of New York Times journalism, as it originally appeared. *Does not include Games-only ...

One hundred and ten years ago, two groups gathered to witness an experiment that those involved hoped would revolutionize how people communicated. The experiment was the official test of the Rev.

WE welcome this volume, which gives full practical details of the “Telef unken” or quenched-spark system of radiotelegraphy. (We use this word, fpr we think it will shortly receive international ...

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 ...

METHODS of transmitting pictures by telegraphy have been known for the last ten years. In a suitably constructed photoelectric cell, the electric current through it can be made proportional to the ...