, is in contact with the Piston Rod. A, the elastic back, which keeps the part B against the rod with sufficient pressure to be steam-tight, and yet creates but little friction. This Packing is made in lengths of about 20 feet, and of all sizes from 14 to 2 inches square. JOHN H. CHEEVER, Treas.… … able tc the patentee, in this country is worth equally as OW MECHANICAL, AND MINING EN- GINEERING at the Rensselaer Polytechnic SIBLEY COLLEGE OF MECHANIC ARTS, much in England and some other foreign countries. Tnustitute, Troy, N. Y. The oldest engineering school | BARREL, KEG, Five…
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