Noon June
`` If that 's what the figures say , I 'll buy it . '' `` Buy _ this _ , then . Continuous daylight everywhere . Noon June Sol-quality light _ except _ that it 's all in the visible . Frank says it 's from bombardment of a layer of something , and Frank admits that the whole thing 's impossible . '' `` When Frank makes up his mind what ` something ' is , I 'll take it as a datum . '' `` Third thing : there 's only one city on this continent , and it 's protected by a screen that nobody ever heard of . ''