From the July 20, 1935, issue
By Science News
BOILING CLOUDS WARN OF “BAD SPOTS” FOR AIRCRAFT
Clouds as a rule are matters of no great concern to airmen; if they cannot climb over them or fly under, they depend on radio from ground stations to help them fly it blind. But when a pilot sees a “mess o’ cauliflower” cooking on the horizon, he seeks a way around. For these billowing masses of black-and-white, which blossom on hot summer afternoons just before a thundershower, show by the rapid piling up of their tops where the dangerous vertical air currents are that can toss an airplane like a leaf or break a Zeppelin in two like a hollow sack.