804 



WATER WORKS. 



10 ft. wide, side walls 3 ft. high, with a fall 

 of 6 in. to the mile : the distance is 4t/s 

 miles. 



At the pump wells there are at present 

 2 engines erected, which, according to the 

 contract, were each to afford a duty of not 

 less than 600,000 Ibs., raised 1 ft. high with 

 1 Ib. of coal, and capacity of 10 million New 

 York galls, of water to be raised into the 

 reservoir in 16 continuous hours. The first 

 engine was tested Jan. 1860, and the duty was 

 found to be 607,982 Ibs. ft. per Ib. of coal; 

 the capacity, for 16 hours, 10,293,102 gallons 

 delivered into the reservoir ; diameter of steam 



cylinder, 90 inches ; length of stroke of piston 

 and pumps, 10 ft. ; diameter of barrel of pumps 

 36 in. The 2nd engine was tested in Jan. 

 1862, and the duty was found to be 619,037 

 Ibs. ft. per Ib. of coal, and the capacity, for 16 

 hours, 10,652,366 galls. ; diameter of steam 

 cylinder, 85 inches; stroke and diameter of 

 pumps same as No. 1 engine. 



The two engines differ somewhat in detail, 

 but in general construction are represented by 

 (Fig. 1), which is a section of the No. 2 engine. 

 The engines were built by Messrs. Woodruff & 

 Beach of Hartford, after designs by Mr. Wright. 



In the fig. a is the steam cylinder with pis- 



Fio. 1. 



ton, steam, and exhaust ports, like other en- 

 gines. In the bottom of the steam cylinder is a 

 stuffing box, through which the steam piston 

 rod passes, and is coupled below to the rod of 



lower pump, p. b is the beam, to the one end 

 of which the piston rod is connected by a 

 cross head and links. The upper pump rod is 

 connected to the other end of beam in the 



