Moving Force. 149 
should always have p=w. But we shall look 
in vain to the results of Mr. Smeaton’s experi- 
ments for this equation. I subjoin the com- 
parative values of p and w, calculated from 
Mr. Smeaton’s first table of eight experi- 
ments :* 
Exper. !. p = 2.3w 
2. p= 2.370 
3. p = 2.15 
A. p = 2.22m 
5. p = 2.16 
6. p = 2.11v 
7. p= 2.0lv 
8. p= 1.85w 
And in the 27th Ex. p. 115, we have p = 2.7. 
‘If these results be correctly stated, Mr. 
Smeaton might truly say, that he “found these 
matters to come out in the experiments, very 
* If Mr. Smeaton’s reduction of his 5th Experiment, 
page 112, be compared with the table page 110, it will 
appear, that he has omitted to include in the quantities set 
down in the table, the weight of the scale, pulley, and 
counter-weight. In finding the value of p, I have, in each 
experiment, taken twice the weight of the scale and pulley, 
added to the counter-weight, to be equal te 1.37 Ib. which 
will be near enough for the purpose of comparisen. 
It should be observed also, that if the table had been 
made out in the same way, the fourth experiment would 
have given the maximum effect. 
