BOILER No. 15. 



107 



Kind of boiler, . . . . . 



Number used, 



Horse-power (basis 12 square feet), 

 Kind of coal, ....*. 

 Age, 



Boiler No. 15 is similar 

 in general features to Boil- 



G 



er No. 9, being provided 

 with a water leg front, 

 which takes the place of 

 the ordinary cast iron front 

 with brick lining. The 

 general arrangement of the 

 boiler and the manner in 

 which it is set are shown 

 in the following cuts. It 

 is to be noted that the 

 space behind the bridge 



Boiler No. 15. 



.Horizontal return tubular. 



One. 



Seventy-four. 



Anthracite, Lehigh, Chestnut. 



One year. 



wall is unusually deep, 



BOILER No. 15, CROSS SECTION THROUGH 



FURNACE. 



extending a distance of 7 feet below the shell, and one of the 

 side walls is exposed on the outside a corresponding distance. 



BOILER No. 15, LONGITUDINAL SECTION. 



