Letter (Astounding, March 1949): I Know, Sprague, But an Invetion Dropped Because Currently Unworkable Is Usually So Buried and FOrgotten as to Be Practically Unknown. The Athodyd Was Heard of in 1910; by 1920 It Was Unheard of! The Same Applies to Microwaves—Vide Hertz—and Waveguides!

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Overview:

Title: Letter (Astounding, March 1949): I Know, Sprague, But an Invetion Dropped Because Currently Unworkable Is Usually So Buried and FOrgotten as to Be Practically Unknown. The Athodyd Was Heard of in 1910; by 1920 It Was Unheard of! The Same Applies to Microwaves—Vide Hertz—and Waveguides!
Author: L. Sprague de Camp
Year: 1949
Type: Essays
Series: Letters: L. Sprague de Camp

Editions/Publications:

Unknown. Astounding Science Fiction, March 1949 (Unknown, L. Sprague de Camp, Street & Smith Publications, Inc., $0.25, 164 pages, digest, MAGAZINE)

This text has been adapted from the Letter (Astounding, March 1949): I Know, Sprague, But an Invetion Dropped Because Currently Unworkable Is Usually So Buried and FOrgotten as to Be Practically Unknown. The Athodyd Was Heard of in 1910; by 1920 It Was Unheard of! The Same Applies to Microwaves—Vide Hertz—and Waveguides! entry at the Internet Speculative Fiction Database and is available under a Creative Commons License. The ISFDB does not endorse or sponsor this use.