made by the multiplication of the turns into the load, 
muft alfo fall fhort of the triplicate ratio by about - 1 - 
part of the whole product. 
Maxim 4th. *Ihe load of the fame fails at the maxi- 
mum is nearly as the fquares , and their effeSl as the 
cubes } of their number of turns in a given time * 
This maxim may be efteemed a confequence of 
the three preceding ; for if the turns of the fails are 
as the velocity of the wind,, whatever quantities are 
in any given ratio of the velocity of the wind* will, 
be in the fame given ratio of the turns of the fails : 
and therefore, if the load at the maximum is as the 
fquare, or the effedt as the cube, of the velocity of 
the wind, wanting -- part when the velocity is 
double ; the load at the maximum will alfo be as the 
fquare, and the eftedt as the cube, of the number of 
turns of the fails in a given time, wanting in like 
manner -Po part when the number of turns are double 
in the fame time. In the prefent cafe, if we com- 
pare the loads at the maximum col. 6. with the 
fquares of the number of turns col. y. of N° 1 and 2. 
y and 6. or the products of the fame numbers col. 8. 
with the cubes of the number of turns col. y. inftead 
of falling fhort, as N° 3 and 4. they exceed thofe 
ratios : but as the fetts of experiments N° 1 and 2. 
y and 6. are not to be efteemed of equal authority 
with thofe of N° 3 and 4. we muft not rely upon 
them further than to obferve, that in comparing the 
grofs ef'etts of large machines^ the direct proportion 
oj the fquares and cubes refpettively> will hold as near 
as the effefts themfelves can be cbferved 5 and there- 
fore 
