A WEEKLY JOURNAL OF PRACTICAL INFORMATION IN ART, SCIENCE, MECHANICS, CHEMISTRY AND MANUFACTURES. Vol. XI No. 14 ."'I t »3 PER ANNUM NEW YORK, OCTOBER 1, 1864. •j (IN ADVANCE.) (NEW SERIES. … HOTCHKISS'S ATMOSPHERIC FORGE HAMMER. air. The air is compressed by a cylinder, A, The hammer illustrated in this connection is, in A great improvement has been made of late years and piston, B, (see Fig. 2.) The cylinder moves in many respects, superior to the drop or the trip-ham- in forging…
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