BOILER No. 61. 



Boiler No. 61. 



Kind of boiler, 



Number in use, ....... 



Horse-power ( basis 12 square feet), 



Kind of coal, 



Age, . . . . . 



211 



Cast-iron sectional. 

 One. 



Thirty-seven. 

 Anthracite broken. 

 Ten years. 



Boiler No. 61 consists of a number of hollow cast iron 

 sections of spherical form communicating with each other, the 

 lower sections being filled with water and the upper ones 

 furnishing steam space. The products of combustion encircle 

 both the upper and lower sections, and the boiler is thus made 

 a superheating boiler. The general features of the boiler are 

 shown in the following cut. 



BOILER No. 61, LONGITUDINAL SECTION. 



