action is suggested by Mr. Sadler to be had by filling the case (in which the arms revolve) with steam, which would cause them to revolve by the pressure it would produce in being condensed in entering the arms. The Thirty-third Figure is a side view of this steam wheel: x, x, x, being the small pipes for conveying the injection from the hollow pipe c, to the end of the arms a, b. n, is the enclosing case, and y, the jacket; leaving an interval between them which may be filled with any slow conducting substance. o, is the pipe leading to the revolving arms which discharge the hot water. This Figure may be considered as an illustration of the engine already noticed as having been tried by Mr. Watt, but with which, it is probable, the ingenious inventor was unacquainted.

M. François, professor of philosophy at Lausanne, having been consulted by some members of the government, respecting the draining of a considerable extent of marshy land, between the Lakes of Neuchatel, Bienne, and Morat, and from some local peculiarities having given up the idea of accomplishing this object by the use of windmills, proposed using a Steam Engine on the plan of Savery's.

The machine (the Thirty-fourth Figure) is composed of the pipe s, w, the lower end of which is inserted into the water, and the upper end enters the receiver a; a pipe n, c, proceeds from the receiver as high as it is required to elevate the water, and has a cock or valve at b. Another pipe t, having a stopcock at f, conducts steam from the boiler k, into the receiver a. d, is a bucket turning on an axis: to this bucket two levers are fixed, having joints at p, and o.