38/41 We can do no more than remark, that if air and water are heated at the equator, and frozen at the poles, there will be equilibrium destroyed, and constant currents caused. And so it happens, so we get the prevailing winds, and all the currents of the ocean. Of these, some of the uses, but by no means all, are obvious. We urge our "Phantom" fleetly to the southern pole. Here, over the other hemisphere of the earth, there shines another hemisphere of heaven. |