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Tlie weight of the load 3 lb. The weight of the load, wheel and can 

 The fcale and weight defcended fix inches and two-tenths every revol 

 The diameter of the wheel was two inches nine-tenths, and the circui 



4 

 5 



EXPERIMENTS. 



A vane of tin, 1 1 inches long, and 5 and i broad, fattened to 

 an arm, projeding from the roller, to regulate the motion ot 

 the machine by its refiftance againft the air ; the extremity ot 

 the vane 21 inches from the centre of the roller, made 



The fame as No, i, with the wheel running upon the iron 

 circle --------- 



The fame as No. 2, but with an obftacle of i inch high, placed 

 on the road -------- 



The fame as No. 2, but with two obftacles 



Ditto, with two inclined planes, i inch high, i inch long, inftead 

 of the obftacles ------ 



Springs placed between the weight and the wheel, two obftacles 

 i inch high, placed on the road _ - - - 



Same as No. i, with half the velocity - - - 



Same as No. 4, with half the velocity ,- - - 



Same as No. 6, with half the velocity - * - - 



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