Far within Ento's Arctic and Antarctic regions there are lands which, during a large part of the year, are covered with ice and snow. Still farther northward and southward and at the poles such intense cold perpetually prevails that the land surfaces are uninhabitable. In these regions are vast deposits of precious and other ores, and to gain access to them many difficulties had to be surmounted. I say had to be surmounted; for, during many centuries, mining within the Arctic and Antarctic Circles has been a settled industry. In remote times, as at present, throughout Ento's Torrid and Temperate Zones, the mining industry has progressed northward, and to a lesser degree southward, and so gradual have been its movements that, almost imperceptibly, it has penetrated polar lands, and mainly through the agency of electrical appliances has the achievement been made possible. You have been informed that more than fifty Ento centuries ago, the Entoans understood electrical engineering and many electrical appliances, and that then, as now, Tûz[a:]mos and air Transports were used as common carriers, but, of course, they were less perfect than those of to-day. Still, they served the requirements of their time, which were less exacting than the requirements of to-day. But you have not known that, quite within Ento's Arctic and Antarctic Circles, there are large underground communities of men, women and children, whose occupations, almost solely, are connected with the mining industry. Naturally, one might infer that the disadvantages of their environments would be both discouraging and depressing. Not so. Through the agency of electricity their underworlds are brilliantly lighted and where necessary comfortably warmed, and it enables them to keep in constant touch with the outer world which, at any time, they may visit, and from whence they may command such luxuries and comforts as they may desire.