272 farmers' and mechanics' journal. 



in a more perfect way than had been effected by any other means 

 that had been before resorted to. 



The same mode of operating, has been, subsequently, employed 

 in dying, and in some other branches of the arts, with very great 

 success, and is, in the patent above, proposed to be applied to tan- 

 ning. But with what propriety it can now be claimed as a new 

 invention, we do not see ; the exclusive right of employing the 

 same principles, as a novel process in tanning appears to be rather 

 equivocal. [Lone/. Juurn. of Jirts and Sciences. 



To Francis Halliday, Esq., for his invention of certain Improve.' 

 ments in raising or forcing Water. Enrolled February, 1827. 



This is a sort of rotary pump, constructed upon the same prin- 

 ciples as a rotary steam engine invented by the present patentee 

 in 1825. 



A wheel, carrying four vanes n-^ pistons, works through the mid- 

 dle of a semi-circular chamber, One end of this chamber is open, 

 and sufficiently wide to admit the bioad faces of the pistons ; the 

 other end is closed, excepting at the narrow space through which 

 the wheel passes edgewise, and tits tightly. 



The wheel is proposed to be placed horizontally, and to turn in 

 that direction upon a vertical shaft. The semi-circular chamber 

 is, of course, horizontal also, and, with the wheel, is intended to be 

 placed at the bottom of a well, or other reservoir, from which the 

 water is to be raised. 



The semi-circular chamber being immersed in the water, and 

 open at one end, will, of course, be tilled with water, and the vanes 

 or pistons, as the wheel goes round, entering the chamber in suc- 

 cession, will shut in the volume of water immediately before it, 

 and press the water towards the closed end of the semi-circular 

 chamber, where, being unable to escape, it will rise in a perpen- 

 dicular pipe leading upwards from that end of the chamber. 



It has been said, that the semi-circular chamber, lying in a hori- 

 zontal position at the bottom of the well, is open at one end, by 

 which the water flows freely into it, but that it is closed at the other 

 end. except a narrow channel through which the wheel passes edge- 

 wise, fitting the opening closely. Now each piston attached to the 

 wheel, in entering the open end of the semi-circular chamber, pre- 

 sents its broad face to the volume of water, and its edges fitting the 

 internal part of the chamber closely, of course, the volume of water 

 is driven forward by the piston, until the piston next following enters 

 the chamber, and brings forward anothervolumeof water, and so on. 

 When the first piston has performed its duty, that is, brought the 

 volume of water forward, an arm on the outside of the wheel, at- 

 tached to the axle of the piston, strikes against a projection, and 

 turns the piston round edgewise, which shuts it into the face of the 

 wheel, and allows it to pass with the wls^ el freely through the nar- 

 row channel at the closed end of the semi-circular chamber. 



