BOILEE No. 43. 



1(55 



Boiler No. 43. 



Kind of boiler, " Double-deck" hor. ret. tub. 



Number used, One. 



Horse-power (basis 15 square feet), 

 Age, 



Boiler No. 43 is of the 

 double-deck type having the 

 general features shown in the 



O 



following cuts. It has two 

 shells, one completely filled 

 with tubes and the other serv- 

 ing principally as a steam 

 drum. The brick setting is 

 arranged so as to admit air 

 through the perforations in 

 the side walls at the back end 

 of the furnace and perforations 

 in the top of the bridge wall. 

 The air supplied in this man- 

 ner is first passed through 

 ducts extending back and forth 



One hundred. 



New. 



BOILER No. 43, CROSS SECTION 

 THROUGH FURNACE. 



through the walls, whereby it is to somo extent heated. 



BOILER No. 43, LONGITUDINAL SECTION. 



