350 PHILOSOPHICAL TRANSACTIONS. [anNO l/SQ. 



oz. makes in the whole 204-15. which is the whole resistance or load: this, mul- 

 tiplied by 93,37 inches, makes 1914 for the effect. 



The ratio therefore of the power and effect will be as 2900 : 1914, or as 

 10 : 6.6, or as 3 : 2 nearly. But if we compute the power from the height of 

 the wheel only, we shall have 96^ lb. multiplied by 24 inches = 2320 for the 

 power, and this will be to the effect as 2320 . 1914, or as 10 : 8,2, or as 5 : 4 

 nearly. 



Table II. containing the Result of l6 Sets of Experivients on Overshot JVheels^ 



Observations ajid Deductions from the foregoing Experiments. 

 J. Concerning the Ratio between the Power and Effect of Overshot Wheels, 

 The effective power of the water must be reckoned on the whole descent ; 

 because it must be raised that height, in order to be in a condition of producing 

 the same effect a second time. 



The ratios between the powers so estimated, and the effects at the maximum 

 deduced from the several sets of experiments, are exhibited at one view in column 

 9 of Table 11. and hence it appears, that those ratios differ from that of 10 to 7.6 



