C 158 ] 
fame, the more the velocity of the wind increafes 
^tho’ the effed will continue to increafe) yet the 
more it will fall fliort of the fquare of the velocity of 
the wind ; fo that when the velocity of the wind is 
double, the increafe of effed, inftead of being as 
X : 4, according to the fquares, it turns out as 10 : 27-5-, 
as thus appears. In tab. 4. col. p. the loads of N° 2, 
4, and 6. are the fame as the maximum loads in 
col. 6 . of No 1, 3, and y. The number of turns of 
the fails with thofe loads, when the velocity of the 
wind is double, are fet down in col. 10. and the pro- 
duds of their multiplification in col. 1 1 : thofe being 
compared with the produds of N° 1, 3, and 5. col. 
8. furnifh the ratios fet down in col. 12. which at a 
medium (due regard being had to N° 3 and 4.) will 
be nearly as 10: 274. 3 dly. The load continuing the 
fame, grows more and more inconfiderable, refped- 
ing the power of the wind as it increafes in velocity; 
fo that the turns of the fails grow nearer and nearer a 
coincidence with their turns unloaded ; that is, nearer 
and nearer to the fimple ratio of the velocity of the 
wind. When the velocity of the wind is double, 
the turns of the fails, when loaded to a maximum, 
will be double alfo ; but, unloaded , will be no more 
than triple, by deduction 2d: and therefore the pro- 
dud: could not have increafed beyond the ratio of 
10:30 (inftead of 10:27^) even fuppofing the fails 
not to have been retarded at all by carrying the maxi- 
mum load for the half velocity. Hence we fee, that 
when the velocity of the wind exceeds the double of 
that, where a conftant load produces a maximum, 
that the increafe of effed, which follows the increafe 
of the velocity of the fails, will be nearly as the velo- 
city 
