Report of Judges on Pumps, &c. 83 



copper air cliamber on regular sizes." [TLis, we doubt uot, is true 

 of pumps furnished regularly for the market.] 



" ISth. Can run any speed without altering the valve motion.-' 

 [Allowed.] 



" 19th. Can repair steam valve without removing the steam cylin- 

 der." [Allowed over the Blake pump.] 



" 20th. Have more patterns and sizes than any. other maker, and 

 make more sizes and styles than any other maker." 



" 21st. The price of this pump, notwithstanding its elegant finish, 

 is no greater than that of any other first class pump, and fully twenty 

 per cent below the price of some." [These two last points, twenty 

 and twenty-one, we do not pass upon.] 



The above are the points Messrs. Knowles & Sibley have furnished 

 us in a condensed form, they are given in addition to a lengthy and 

 interesting paper which we herewith inclose. 



C. B. Hardick, although especially requested so to do, has failed i;o 

 furnish us the points of superiority, in a condensed form, which he 

 claims for his direct acting Niagara pump. Therefore, in order to 

 exclude an_y claim of partiality against us, we beg to submit to your 

 Board, as a part of our report, the ivhole of the subject matter of the 

 paper he submitted to us on the subject : 



" The superiority claimed for the ^N'iagara Direct-acting Steam 

 Pump is 



'■'■First In the construction of its water chest, and the ease as 

 well as rapidity of access to the valves therein in case of obstruc- 

 tions entering the same through suction, which in case of emergency, 

 as on a vessel at sea, where there are occasions in which time 

 becomes of vital importance, the valve-chest being fitted with a cap 

 or cover at each side, resting on one bolt, there being no hinge or 

 bolt in valves to hold them in position, as the construction of the 

 water-chest is such that they are guided at each end, and held in 

 position by the chest itself, the removal of either cap by unscrewing 

 one nut, at once exposes all the valves for removal, examination, and 

 cleaning openings of anything which may have entered to impede 

 their operation. The valves are four in number and of composition, 

 therefore are equally adapted for cold or hot water, or pumping 

 acids and liquor, the chemical action of which, iron could not with- 

 stand ; each valve has also a flat face on four sides, and in case of 

 wear by long continued use, can be turned so that each face presents 

 an accurately fitting surface to the valve seat, which also can be 



