“There seems to be a region high in the air over all countries, where it is always winter, where frost exists continually,” he wrote. The evidence? Hail, which fell even during the warmest months and occasionally acquired impressive dimensions. “How immensely cold must be the original particle of hail which forms the future hailstone, since it is capable of communicating sufficient cold, if I may so speak, to freeze all the mass of vapour condensed round it, and form a lump of perhaps six or eight ounces in weight!”
