Letter (Astounding, March 1949): I Know, Sprague, But an Invention 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!
| First published | March 1949 |
|---|---|
| Type | Essay |
| Series | Letters: L. Sprague de Camp |
Publications (1)
| Date | Publication | Publisher | Type | Page |
|---|---|---|---|---|
| March 1949 | Astounding Science Fiction, March 1949 | Street & Smith Publications, Inc. | MAGAZINE | 158|158.1 |