Reports of Judges. 95 



of friction. Other illustrations might be cited, but the foregoing 

 are sufficient to show the value of practical trials. 



Second Division — Articles Examined but not Tested. 



No. 661. Knowles' Steam Hjdi'aulic Pump. (Kuowles & Sib- 

 ley, Warren, Mass.) We would speak in the highest terms of this 

 arrangement, both as regards the design and application of steam 

 direct to hydraulic work, and also of the workmanship, which is 

 of a very excellent character; and looking at it in relation to tho 

 economical working of hydraulic power, we consider it worthy of 

 a first premium. 



No. 929. Steam Air Pump. (Campbell & Hardick Brothers, 

 Brooklyn, L. I.) In the application of steam to pumping air the 

 combination by which a small stream of water is made to pass 

 through the air cylinder and valve chest, so as to water-pack the 

 valves, is worthy of notice, and we would recommend for this 

 pump a second premium. 



No. 787. Rotary steam and Belt Pump. (Metropolitan Engine 

 Company, New York.) The committee were much disappointed 

 in not being able to have a practical test of this pump in compe- 

 tition with the reciprocating pumps. They therefore have to make 

 their decision as to its merits from examination and not from prac- 

 tical tests, which would have been much more satisfactory. 



The arrangement shows much ingenuity in the inventor, yet for 

 a pump is quite complicated with, packings and wearing pieces, 

 which we think would be a serious objection when used with fiuidis 

 charged with dirt or grit. 



In the application of the system as a steam cylinder, we see 

 points of excellence which meets our approval, and the committee 

 would therefore recommend it as an article worthy of your notice, 

 and deserving a second premium. 



N. 946. Rotary Steam Pump. (Henry C. Dart & Co., 5^ Pine 

 street. New York.) The same remarks will apply, as regards the 

 testing of this pump as was made by the committee in their report 

 on No, 787. They would only add they feel very sorry such au 

 opportunity has been- lost, of comparing the relative economy of 

 the rotary with the reciprocating system. 



As far as could be judged by examination, the committee were 

 very favorably impressed with the arrangement of the pump as 

 combining great simplicity with freedom from friction by the 

 pistons, and when arranged as a power pump to be driven by belt, 



