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Scientific American, Vol. 46, No. 25 (1882) (1882)
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ches on their outer circumference, and they are all without a flaw. Throughout the whole tower every stone is dove- __MICH WATER WATER TANKS tailed, by projections and grooves, into those above, below, and on either side of it; and the interstices between the blocks have been filled up with… … © 1882 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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