A WEEKLY JOURNAL OF PRACTICAL INFORMATION IN ART, SCIENCE, MECHANICS, CHEMISTRY AND MANUFACTURES. Vol. XU1.e=No. 17} $3 PER ANNUM (NEW SERIES.) NEW YORK, APRIL 22, 1865. (IN ADVANCE. Rock Borer and Grooving Machine. available in erecting light-houses or observatories; | Glass Trade at the West. The…
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