Harper's New Monthly Magazine Volume 21 June to November 1860 . sure has an area of about 20 mound, A, covers an acre of ground, and is40 feet high. It is truncated, and the level areaat its summit is reached by an inclined plane orgraded way from the north. B is less in size,but of precisely the same form. It is 25 feet inheight. C is an excavation 15 feet deep and100 feet in diameter, and is surrounded by a lowembankment three feet in height. Within the ancient works at Marietta, in Ohio,there are a number of temple mounds of greatregularity, of one of which Figure 12 is a plan. It
Harper's New Monthly Magazine Volume 21 June to November 1860 . sure has an area of about 20 mound, A, covers an acre of ground, and is40 feet high. It is truncated, and the level areaat its summit is reached by an inclined plane orgraded way from the north. B is less in size,but of precisely the same form. It is 25 feet inheight. C is an excavation 15 feet deep and100 feet in diameter, and is surrounded by a lowembankment three feet in height. Within the ancient works at Marietta, in Ohio,there are a number of temple mounds of greatregularity, of one of which Figure 12 is a plan. Itis 188 feet long by 132 wide, and 10 feet on each side are graded ascents, render-ing easy the passage to the area at its grades are each 25 feet wide and 60 feetlong. One of the most remarkable of this classof ancient monuments is the great mound ofCahokia, Illinois, of which an engraving wasgiven in a previous article. Its form is that ofa parallelogram, 700 feet long by 500 wide atthe base. It is 90 feet high. Upon one side is 172. 12.—TEMPLE MOUND, MARIETTA, OUIO. a broad apron or terrace, which is reached by agraded ascent. At the time this mound was oc-cupied by the Monks of La Trappe the terracewas used as a garden. It is IGO feet wide and350 long. The summit, or higliest part of the imound, measures 200 feet in width by 450 inlength. Tliis mound covers not far from eightacres of ground, and the area of its level summitis about five acres. Its solid contents may beroughly estimated at 20,000,000 of cubic feet. So far as ascertained these mounds cover noremains, and they were obviously designed asthe sites of temples or of other structures whichhave passed away, or as high places for theperformance of religious ceremonies. The like-ness which they bear to the Tcocallis of Mexicois striking, and suggestive of their probable pur-poses. V. ANIMAL-SHAPED MOUNDS. [In the form of men, animals, birds, and reptiles; in Ohio on elevated positions; in Wi
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