BOILER No. 35. 



147 



BOILER No. 35, LONGITUDINAL SECTION. 



Dimensions of Boiler No. 35. 



Diameter of shell, 60 in. 



Length between heads and length of tubes, . , . . 17 ft. 

 Number of tubes ( collective, ) three inches outside diameter, 231 



Area of heating surface, 3,306 sq. 



Area of grate surface, 



Area through tubes, ..... 



Area through flue, ...... 



Height of chimney, 



Width of air spaces and metal bars in grates, 



Distance of grate to shell, 



Distance of flat bridge wall to shell, .. 



Ratio of heating surface to grate surface, 



Eatio of grate surface to tube area, .. 



ft. 



69.8 sq. ft. 



9.5 sq. ft. 

 10.1 sq. ft. 

 98 ft. 

 3-8 in. 

 19 in. 

 12 in. 

 47.4 to 1 



7.3 to 1 



