ubject of a patent recently granted to Mr. Robert L. concussion will be greater than the regular steam pressure. vens, of Albany, Oregon. For his experiment, Mr. Lawson had a plain cylinder engraving of the machine as it stands, and we should have liked to reproduce this diagram, but the book is… … lb., at 335 lb., and at 365 lb., produced the common to such devices, and which is con- same results. But when the valve was opened sequent upon the wearing of their bearings, LAWSON'S EXPERIMENTAL BOILER EXPLOSION-ARRANGEMENT at a pressure of 380 lb., 'the boiler exploded is avoided. The invention…
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