ig6 ' Account of a Patent Pump, 



engine,) in flable and farm yards, and in all manufactories, 

 or other places, where there is a neceflity for railing water, 

 and the rifk of fire. 



With all thefe advantages it is a fimple and durable pump, 

 and maybe made either of metal or wood at a moderate expenfe. 



No particular mode being eflential in the working of this 

 pump, it may, according to choice or circumllances, be 

 wrought by all the methods pra&ifed with the common 

 pump. In many cafes, however, it may be advantageous 

 to have two of them fo connected as to have an alternate 

 motion ; in which cafe, one air veflel, and even onefu&ion- 

 piece, might ferve both. 



Its principles admit of various modifications ; but as what 

 is already mentioned may he (uflicient to indicate its fupe- 

 riority over the common and chain pumps, and the advan- 

 tages likely to refult from its general ufe, a further detail is 

 unnecefiary. We cannot, however, difmifs this article with- 

 out mentioning that we have feen two certificates refpe£ting 

 its utility at lea, which deferve particular notice. One of 

 them, dated the 23d of June laft, is from captain William 

 Murray, of the Prince of Wales excife yacht, of 20 guns, 

 who had one fixed on board that veflel in the year 1794, 

 which was found to anfwer fo well, that he has nnce had a 

 fecond and third one : he finds that the pifton leathers are 

 not in the lead hurt by fix years ufe, and recommends the 

 pump highly to veflels which carry corn, or fuch fubftances 

 as are apt to choke or injure other pumps. The other cer- 

 tificate, dated the 14th of July laft, is from captain Hurft, of 

 the Britannia of Glafgow, but then in the Thames. He 

 ftatcs, that one of thefe pumps was fixed on board his veflel 

 in April 1800, and had anfwered its purpofe in the mod 

 complete manner, and gives one particular inftance in the 

 following words : — " When at fea, about fix weeks ago, a 

 quantity of coffee, bv fome means, had got into the fhip's 

 well. Upon trying the common pump, it was loon rendered 

 almoft ufelefs by the coffee preventing, in a great meafure, 

 the valves from acting. I then tried the patent pump, 

 which, with the greateft facility, completely difcharged the 

 coffee from the well." He then adds: "The pifton lea- 

 thers are Mill as good as when the pump was firft fixed, nor 

 had I ever occafion to give any part of the pump the fmallefl 

 repair. I well know the great advantage of having a pump 

 not liable to choke, having, during the voyage before 

 yours was put on board, been nearlv loft in the Britannia, 

 laden with corn, from the choking of the pumps. As an 

 engine for extinguishing fire, as far as relates to the force, 



quantity 



