EET. Recent Engineering iDTentlons. the English Mechanic. The upper part consists, flrst, of a We present engravings of two examples of unglazed Rus- Mr. William P. Barclay, of Virginia City, Nev., has pat- screw, S, at the top. Fig. 1; secondly, of a ented an improvement in Hydraulic and Wire… … portionate to the size of the hole to be drilled. wells without disturbing the tubing or valves. RUSSIAN POTTERY. Near to the lower end or cutting edges of the It consists in the arrangement of the upper drill is fixed rigidly a metal guide bar or plate, valves in connection with the cell…
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