This is a plan proposed by Mr. Eaton in 1850, and consists in providing two water cisterns A, B; the short leg of a siphon C enters the upper cistern, and terminates in three escape pipes, capable of being rotated by the pulley _a_, connected by a band with the pulley _b_, affixed to the vertical shaft _c_, rotated by the inverted Barker's mill D, constructed on the short leg of the inverted siphon E, supplied from the bottom of the upper water cistern. By this means it was expected to keep up a continual flow down the pipes C and up E, as shown by the arrows. [Illustration] Legge's Hydro-Pneumatic Power Device. 1850 This is an English production, and the inventor claims that it is the result of fourteen years' study. We take the description from Dircks. It is as follows: It is a dome-shaped vessel; its upper part A filled with air, and the lower half with water, as at B. This vessel contains two apparatus for returning the water which is worked through C D, apparently like pump barrels. The air is to be at from 250 to 500 pounds pressure on the square inch. When once started it will (it is stated) go on as long as it is oiled. The inventor estimates a one thirty-second share at one thousand pounds value. [Illustration] Waterblowing Machine In 1827 "Mechanics' Magazine," London, published an account of an invention which was furnished to it by some correspondent. The invention, it seems from the communication, had previously been described in an appendix by Dr. Brewster to a volume of Ferguson's lectures, and it also seems that the description furnished "Mechanics' Magazine" was copied from such appendix. The following is the article as it appeared in "Mechanics' Magazine": I am encouraged to send you the following attempt at perpetual motion, because I think it is upon a principle that has not yet been examined in your pages.