AMERICAN STEAIVI ENGINEERING 281 



13 feet 8 inches between the centers. Both the crosshead 

 and crank pins measure 14 inches diameter by 14 inches long. 

 The fly wheel is 28 feet in diameter and weighs 150 tons. 

 The total weight of the engine and generator is 700 tons. The 

 cyhnders are not steam jacketed; a reheating receiver is 

 interposed between the high and low pressure cylinders. 



The following details of the weights of the various por- 

 tions of these engines may be of interest : 



Name of Piece No. ofPiece. Weicht in H.h. 



Wheel center, small half 1 21,000 



Wheel center, large half 1 2,900 



Segments of wheel (11 segments) 11 12,000 



Lower frame , , , . . 11 21,000 



SHde section of frame o . , „ 2 36,000 



Bedplate, large half „ , 2 59,000 



Bedplate, small half , . . » . c. . 2 24,000 



Low pressure cylinder , , . 1 28,000 



High pressure cylinder ...,...., .,0 .... o » 1 15,000 



Low pressure cyhnder heads ........ oc . 2 26,000 



High pressure cylinder heads » c . o c . 2 7,500 



Shaft 1 72,000 



Cranks, each o .,...,., c o . = .-. c . 2 23,000 



Connecting rods , ... = <..... c » c. 2 9,000 



Receiver 1 20,000 



The steam piping is of wrought iron mth steel flanges 

 riveted on; Van Stone joints are used. The drum of each 

 boiler is connected to a 16 inch ring main by an 8 inch 

 header; there are six of these rings in all, two for each tier 

 of l3oilers. The rings are interconnected by eleven vertical 

 16 inch mains, which pass into the engine room and lead to 

 the engines, one main supplying each engine. The exliaust 

 piping is of cast iron and is supported by hangers. 



In comparing this station as a whole with similar in- 

 stallations in Great Britain and on the continent, say with 

 the Glasgow corporation tramways or Liverpool stations, 

 or with the Berlin or Hamburg plants, it cannot be said that 

 taken as a whole, the comparison is entirely favorable to the 

 New York plant. The individual items, such as engine, 

 steam piping, dynamos, switch boards, transformers, are 



