British v. American Invention.

Progress, Volume II, Issue 10, 1 August 1907, Page 376

British v. American Invention.

The Army and Navy Journal says that though England appears to be taking the lead in turbines, she has copied America far more in her types of screw engines than America has copied England. The prevailing types of screw engines first used in the mercantile marines and the navies of both countries are what are known as the " back action," " direct action," and the " vertical overhead cylinder," engines ; and these types all oiiginated in America. The first ship in the English navy which had her entire steam machinery below the water line, and the first one whose engines were attached directly to the screw shaft, was the " Amphion," the design of whose machinery was made in New York and sent to England.

over steam in certain lines was definitely announced and measured. " In dealing with the respective merits of blast-furnace steam, plant, and of blastfurnace gas plant," a distinguished authority points out that "the comparative working expense of the two systems may be illustrated by the following examples : — A horizontal blast fan, driven by a gas engine developing