BOILEE No. 65. 



219 



Draught suction, 0.09 in. 



Water per pound of coal, 8.52 Ibs. 



Water per pound of coal from and at 212 degrees, . .9.12 Ibs. 



Water per pound of combustible from and at 212 degrees, 10.61 Ibs. 



The test on Boiler No. 64 shows the performance of a water 

 tube boiler, working under somewhat unfavorable conditions 

 for the best results. The slow rate of combustion employed, 

 and the admission of air above the fuel, the fuel being in this 

 case anthracite coal, were no doubt the cause of some loss. 

 As the results stand they do not differ materially in point of 

 economy from those obtained from the horizontal tubular 

 boilers, No. 13, No. 14, and No. 15, made with a similar class 

 of coal. 



Boiler No. 



Kind of boiler, 



Number used, 



Horse-power ( collective, basis 12 sq. ft. ) 



Kind of coal, 



Age, ....... 



Boiler No. 65 embraces four 



65. 



Water-tube. 



Four. 



Four hundred and sixty-eight. 



Anthracite Shamokin, pea. 



Three years. 



water tube boilers of the 



general form shown in longitudinal section in the following 



<5 * *-2 



cut. They are set in two independent batteries of brick work, 

 each embracing two boilers. The main flue behind the boilers 



o 



is provided with a small flue heater, consisting of wrought 

 iron pipes, having an exposed surface amounting to 515 

 square feet. 



BOILER No. 65, LONGITUDINAL SECTION. 



