166 



BOILER TESTS. 



Dimensions of Boiler No. 43. 

 Diameter of lower shell, . . . . 

 Diameter of upper shell, ...... 



Length of shell and tubes, 



Number of tubes 3 inches outside diameter, . 

 Area of water-heating surface, .... 

 Area of steam-heating surface, .... 



Area of grata surface, 



Area through tubes, 



Area through chimney, . \ . 



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, 



Results of Tests, Boiler No. 43. 



54 



36 



15 



114 



1,521 



88 



in. 

 in. 

 ft. 



sq. It 

 sq. ft 



22.5 sq. ft 

 9.4 sq. ft 

 7.1 sq. ft 



70 ft. 

 3- 8 in. 



67.6 to 1 

 3.9 to 1 

 4.8 to 1 



NOTE. The coals when fired contained the following percentages of moisture: 

 Mixei! fuel, per cent. ; Cumberland, 2.5 per cent. ; Nova Scotia Culm, 7 per cent. 



