Transcriber’s Notes and Errata
This etext was produced from Astounding Science Fiction, May 1959. Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.
The original page numbers from the magazine were retained.
The following typographical errors were corrected:
| Page | Error | Correction |
| 63 | catastrophies | catastrophes |
| 65 | Phenacitin | Phenacetin |
| 65 | Caffiene | Caffeine |
| 66 | stacatto | staccato |
| 66 | phosphorpus | phosphorus |
| 68 | charteuse | chartreuse |
| 75 | dizzness | dizziness |
| 76 | MacNeal | MacNeil |