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Scientific American, Vol. 81, No. 18 (1899) (1899)
leaf 6
d nickel filings. One end of the the time during which that portion of the sky was ob- and as long as the Morse key is depressed, it was secured by clouds. Passing clouds or haze, during the evident that if a suitable receiver and recorder could time of observation shouldalso be recorded. The date… … occur whenever the Key of the transmitter at the sky will be forined, in which the stars will appear as points. A rapid-rectilinear lens is to be pre- distant station is depressed. Mr. Marconi has de- @ee @ e#© 8* * 8 8 + ferred in the first case, a wide-angle lens in the vised an ingenious…Internet Archive · Public domain (published before 1931). Free to use for anything.
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