'rn ANSArnoNS of section c. 



887 



Jersey, makes regularly the run butweon Jersey City and Bound Broolc, thirty-two 

 miles, in thirty-seven minutes, at the rate of o2'10 miles per hour, and 1ms made it in 

 o3 minutes, 58-2 miles per hour; and has run three miles of the route in 2 minutes 

 L'4'5 seconds — 74-74 miles per hour. She has run a single mile in 45 seconds — 80 

 miles per hour. A test of a locomotive by John W. Hill is given in a manner 

 vliich liurdly admits of condensation. The train I'esisfance, on a level, appears 



to hi about. 6'7 pounds per ton ( ., ^7,. I . Feed-water evaporated per indicated 



hom'-power, per hour, 32-28, .'}.'V4(), and31-0G pounds — mean, .'!2-o5 — which, with 

 the reiLsonable evaporative duty of nine pounds of water per pound of coal, should 

 kve been done witli 3-62 pounds of coal per i.h.p. per hour. In fact, the coal 

 was 4-24, 7-03, and 0-30 pounds — mean, 5-54 pounds— per i.h.p. per hour, and the 

 evaporation during the middle run fell as low as 4-51 pounds of water ]wr pound 

 of coal. Tliis shows clearly the deficient fire-grate area already noticed. The 

 water given above includes all that was blown off at the s.afety-valve, and used at 

 the whistle and gauge-cocks, and in experiments with a calorimeter. Allowing 

 for this, the consumption of water was 30-26 pounds per i.h.p. per hour. The fire- 

 jrrate-area was but 15-09 square feet, and the rate of combustion was at times as 

 high as 172 pounds per hour on each square foot of grate-area. AVith a grate 

 four-and-a-half times as large, such as might be obtained in a "Wootten 

 engine, this rate would be reduced to 38-2 pounds, and might be still further 

 reduced, by increased economj', to as little as 20 pounds per square foot and per 

 hour. 



Some points of locomotive practice are then given. Locomotive No. 137, on 

 the Boston and Albany Railroad, ran 43() days out of 438 (with the loss of only 

 two days by some slight accident), 108-11 miles per day of actual service, 87,100 

 miles m all, at the rate of 72,192 miles per annum, and was then repaired, 

 including painting and varnishing, in four days, and resumed her regular 

 service 



The locomotive ' Pacific,' built by the sliop of which the writer was superin- 

 tendent, was placed in service on the Boston and Maine Railroad, March 16, 1855, 

 and ran regularly in passenger service to the close of 1883, 28 years 9^ months, 

 and has since run 60 miles per day on gravel trains, making an aggregate mileage 

 of 904,255 miles — an average, for 29^ years, of 30,050 miles per annum. ^lore 

 than one-half of the material originally put into her is in her still, and she is in 

 good working order. 



Three engines on the Hudson River Division of the New York Central and 

 Hudson River Railroad, have made a '''cord of which the following table contains 

 the mean results. Mean weight of trains, 294 tons : — 



Mean ok All. 

 Perfoumance: No. 10, No. ;53, \ No. ;{4. 



Mean mileage in 6 years . 

 Number of days in service 

 Xiunber of days idU^ 

 Mean number of months 



in si^rvice 

 Mean n\uubcr of miles per 



(lay 

 Mean number of miles per 



month 

 Mean niunber of miles per 



annum 

 Mean numiier of gallons 



of oil used 

 Mean number of miles per 



gallon 

 Mean total cost of oil 

 Mean total cost of waste . 



•I!i:?,48!t 

 1,777 

 :ill'.i.G7 

 70 



•-'77.G!J 



7,i)l'.l 



82,218.11 



:i,GG7 



];u.«i 



,Si,4'.n.G7 

 28G.G7 



MehlS Cost or Repaius. 

 LAnouu: No. 10, No. iiiJ, and No. ','A. 



Items 



^laohinist . 

 lUacksmith . 

 Boiler-maker 

 Coppersnnth 

 Tin.smitli 

 Carjienter . 

 I'aintor . . 



< )n Kiigiiie 



Oil 'I'Liulir 



o,972.2G 



;V.I8.1H 



I- 



.:1 



^rium 



iiM 



