BOILEE No. 46. 



173 



Dimensions of Boiler No. 46. 



Diameter of lower shell, 



Diameter of upper shell, ....... 



Length of shells and tubes, ...... 



Number of tubes ( collective ) 3 inches outside diameter, 

 Ar<ja of water-heating surface, ..... 



Area of steam-heating surface, 



Area of grate surface, ....... 



Area through tubes, 



Area through flue, ........ 



Height of chimney, . . . . 



Width of air spaces and metal bars in grates, 

 Ratio of water-heating surface to grate surface, 

 Ratio of steam-heating surface to grate surface, 

 Ratio of grate surface to tube area, 

 Ratio of grate surface to flue area, 

 Area of heating surface in flue heater, . 



. 48 



. 30 



14 



320 



4,058 



280 



70 



in. 

 in. 

 ft. 



sq. 

 sq. 

 sq. 



ft. 

 ft. 

 ft. 



13.2 sq. ft. 

 9 sq. ft. 

 . 80 ft. 



Air 5-8 in., metal 1 in. 



58 to 1 



4 to 1 



5.3 to 1 



7.8 to 1 



1,920 sq. ft. 



Eesults of Tests, Boiler No. 46. 



Test No. 91. I Test No. 92. 



NOTE. The coal when fired contained 5 per cent, of moisture. 



