ON MERCANTILE STEAM TRANSPORT ECONOMY. 



127 



Diagram E, showing approximately the Nautical Mileage Consumption of 

 Fuel, for vessels from 1000 tons displacement, up to 25,000 tons, the Co- 



V 3 D§ 

 efficients of Dynamic Performance deduced from the Formula i n( j # h. p. 



being assumed to be 250, and the Consumption of Coals being assumed to 

 be at the rate of 2^ lbs. per Ind. h.p. per hour. 



o 

 a 



s - 



a 



O 



6.000 



10,000 



16,000 



20,000 



25,000 



With reference to the foregoing Table C, showing the mutual relations of 



displacement, power, and the consumption of coals per day, per hour, and 



per knot, for vessels of a gradation of sizes, from 250 tons displacement up to 



25,000 tons, the coefficient of dynamic performance, deduced from the formula 



V 3 D$ 



■ being assumed tobe250,and the consumption of coals being assumed 



lnd. h. p. 



to be at the rate of 2| lbs. per indicated h. p. per hour, on these data, the 



