C ia8 ] 
Reduff ion of the preceding Specimen. 
In thefe experiments the head being 6 inches, and 
the height of the wheel 24 inches, the whole de- 
lcent will be 30 inches : the expence of water was 
] 4 i ftrokes of the pump in a minute, whereof 12 
contained 80 lb.; therefore the water expended in a 
minute was 96 -fib. which, multiplied by 30 inches, 
gives the power = 2900. 
If we take the 20th experiment for the maximum , 
we fhall have 20 turns in a minute, each of which 
raifed the weight 4 4- inches, that is, 93,37 inches in 
a minute. The weight in the lcale was 19 lb, the 
weight o/’the lcale io-1-oz.; the counter-weight 3 oz. 
in the fcale, which, with the weight of the fcale 
io-^oz. makes in the whole 20 -lb. which is the 
whole refiilance or load: this, multiplied by 93,37 
inches, makes 1914 for the effedt. 
The ratio therefore of the power and ejfeff 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 lhall have 96 -§ lb. multiplied by 
24 inches = 2320 for the power , and this will be 
to the effeff as 2320 : 1914, or as 10 : 82, or as 
5 : 4 nearly. 
The reduction of this fpecimen is fet down in 
N°. 9. of the following Table ; and the reft were de- 
duced from a fimilar fett of experiments, reduced in 
the fame manner. 
Table 
