Authentic Science Fiction Monthly No. 71 — page 127: what you’re looking at

Machine-transcribed from the original scan — historical spelling and the odd misread are preserved.

- AUTHENTIC SCIENCE FICTION and so avoid, most of the radiation. The dark side, fitted with a multiplicity of vanes so as to increase the area, would be working to radiate the unwanted heat away from the ship. Aside from radiation, there is one other method in which to cool the ship. It is wasteful, terribly so, but it would work. We have already seen that a rapidly expanding gas will _ lower its temperature. It does that because it spreads its heat content over a wider area. We can also trap the heat of a room by compres- sing the gas and so localising the heat. Let us imagine that the ship has reached the point where the heat is causing acute discomfort. The struc- ture is hot, the air is hot, everything is hot. Now, if we bleed the air off into space it will take its heat with it and, at the same time, cool by expansion. We re-seal the hull and open fresh containers of liquid air. These have been kept in shielded vacuum and have been insulated. The liquid air will absorb heat — and so further cool the ship. But the system is going to. need a lot of liquid air. This heat-factor is going to be a nuisance when space is finally conquered. It will be solved somehow, that is cer- tain, but in the meantime the problem remains. While the average adult continues to generate so much body heat crewing the rockets may be guided by that fact. Two men, yes. Three men, no; too much generated heat. And it could have a direct bearing on the length and duration of exploratory flights. One thingis certain—‘‘keep- ing cool” in space will be more than just a saying. It will be a headache of prime im- portance. 126 EComicbooks7com