companying engraving illustrates a screw- recently been secured by Mr. Samuel Irwin, of Lind- propeller of a construction which enables it to be re- provements is described in a patent recently granted say, Ontario, Canada. versed by a sliding movement of the propeller shaft. to Mr. Charles L.… … venient point in the vessel a hand C, to the hydrant cham- ber. Projecting up- lever is mounted, which is suitably REVERSIBLE SCREW-PROPELLER,. NON-FREEZING HYDRANT. connected to the propeller shaft and ward from the section, may be actuated to slide the same longitudinally. Our C, is a cylinder…
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