W. A. Norton on Ericsson’s Caloric Engine. 411 
power, to show that this supposition is erroneous it is only neces- 
Sary to state that, asa matter of fact, the amount of coal con- 
sumed for each horse-power by the engines of the Ericsson, is 
even greater than that consumed by the stationary calorie engine. 
Ericsson gives 60 as the horse-power of the stationary engine, 
and 0-6 Ibs. per horse-power per hour as its consumption of fuel, 
and 600 and 0-9 lbs. as the corresponding quantities in the case 
of the Eriesson’s engines. 
_ Let is now see what will be the result in case the estimated 
capabilities of the caloric engine should be realized. If the 
horse-power should be increased from 300 to 600, the speed of 
the ship would be increased nearly in the proportion of the 
¥300 to the */600, or of 669 to 8-43; that is, to 8:82 or 9:45 
miles per hour, according as the speed on the trial trip is taken at 
Torat 74 miles. To obtain a speed of 15-5 miles, which is the 
speed of the Arctic in still water, the expenditure of fuel must 
Must be admitted to be within the bounds of sorted that vo} 
oric ships may hereafter compete successfully with these ‘. e 
brated Steam-ships. At least this conclusion seems to follow, 
Unless we have underrated the necessary weight of the caloric 
ehgines. It must be left to time to decide the question, whether 
the full estimated power of the caloric engines can be actually 
Stained ; and whether, therefore, the results which have ere in- 
dicated, will, from being a mere ideal limit, ever come to be an 
actual realization. 
