"He inspired the directing mind, and gave strength to those that executed. He created the fire that married the two substances into one indestructible compound mass. "Behold, and wonder!" A circular tower, whose base above the foundation is more than a mile in diameter, and whose round walls are more than a hundred feet in thickness, is carried up from the lower land nearest to the sea-level until the head of the tower reaches and supports the projecting mountain mass above. The diameter of the tower-head is one-third of the diameter of the base. The diminution being very gradual is scarcely perceptible, and appears to be the effect of distance. The height of the tower is the same as its circumference at the base. Our ordinary powers of vision generally exceed yours, and the light in our world is more intense; and yet the head of the tower can from the lower cities seldom be distinguished from the illuminated clouds above. The area in the interior of the tower at the base, and for some distance above, is divided horizontally and vertically, and the compartments are used for storehouses, including the storing of scientific instruments, and for experiments connected with science. The different strata and incidents of the atmosphere at various elevations are there studied with peculiar advantage, as there are numerous landings at different distances, and we have the means of ascending and descending the whole distance, or of alighting on any of the landings by means of a machine raised and lowered by electric power. As the work progressed, stages were constructed at different heights on which buildings were erected, where the workmen and their families lived until the task was completed, the materials and electricities used, as well as provisions and necessaries, being raised to these stages by electric power. The principal material used is the hardest and most durable substance known in our world--an amalgamated material consisting of certain proportions of iron and marble fused into a solid compact mass by the action of fire and electricity. HEAVY MATERIALS LIGHTENED BY ELECTRICITY. The blocks used were of immense size, so huge, that even with our electrical and mechanical levers, many expedients were employed to raise them to their assigned places. Electric science had greatly advanced in my reign, and electric powers had been discovered by which the heaviest masses could be lightened temporarily, so that their specific gravity, called by us the "tenacious electricity," and its tendency to seek the sympathetic electricity of the earth was temporarily diminished, if not entirely neutralized, without injury to the mass subjected to the operation.