so that our whole train weighs, at a rough calculation, 209 tons, and should 

 we strike an object sufficiently heavy to resist us, we would exert upon it 

 a momentum of 12,749 tons — a force hard to resist! 



Look out at the driving-wheels; see how swiftly they revolve. Those 

 parallel rods, that connect the drivers, each weighing nearly 150 pounds, 

 are slung around at the rate of 210 times a minute. Don't you think that 

 enough is required of an engine to run 42 miles per hour, without making 

 it gain 18 miles in that time? Those tender-wheels, too, have been turning 

 pretty lively meanwhile — no less than 600 times per minute. Each piston 

 has, in each minute we have traveled, moved about 700 feet. So you 

 see that, all around, we have traveled pretty fast, and here we are in Co- 

 lumbus, ''on time;" and I take it you are satisfied with 42 miles per 

 hour, and will never hereafter ask for 60. 



Let us sum up, and then bid good-bye to the Deshler and her accom- 

 modating runner, Johnny Andrews. The drivers have revolved 16,830 

 times. Steam has entered and been ejected from the cylinders 67,320 

 times. Each piston has traveled 47,766 feet, and we have run only 55 

 miles, at the rate of 42 miles per hour. 



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