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Thomas Edison's megaphone...
Thomas Edison's megaphone...
Item # 616759
August 24, 1878
SCIENTIFIC AMERICAN, New York, August 24, 1878
* Inventor Thomas Edison
* Megaphone invention print
Taking a bit more than half of the ftpg. is an illustration of a gentleman and a few onlookers using "Edison's Megaphone". The article, which begins on the ftpg., gives the background of "ear & speaking trumpets" plus talk about Edison's invention. The continuation of the article inside includes three more illustrations. Yet another page has an illustration captioned: "A Simple Phonograph" with a related article (see).
Other period inventions with illustrations. Complete in 16 pages, nice condition.
Category: Post-Civil War
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