Letter (Astounding, December 1942): Smith Was Not Referring to Contraterrene Matter, Which Is Positive Matter with Inverted Electrical Polarities; He Was Talking About Matter with Negative Mass, a Completely Different Thing.
| First published | December 1942 |
|---|---|
| Type | Essay |
Publications (1)
| Date | Publication | Publisher | Type | Page |
|---|---|---|---|---|
| December 1942 | Astounding Science-Fiction, December 1942 | Street & Smith Publications, Inc. | MAGAZINE | 111 |