x2 Mr. Micuery. on the Means of diftovering the 
aE Hence, according to article re, if the femi-diameter of 
afphzere of the fame denfity with the fun were to excéed that of 
the fun in the proportion of s60 to 1, a body falling from an 
§nfinite height towatds it, would have acquired at its furface a 
greater velocity than that of light, and confequently, fup- 
pofing light to be ‘attracted by ‘the fame force in proportion te 
its vis inertiz, with other bodies, all light emitted from fuch/a 
body would be made ‘to ‘return towards it, by its own proper 
eravity. 7 | 
17. But if ‘the femi-diaméter’of a fphere, of the fame: eal 
fity with the fun, was of any. other fize lefs than 497 times 
that of the fun, though the velocity’of ‘the ‘light emitted from 
fuch a body, would never be wholly deftroyed, yet would it 
always fuffer fome diminution, more or lefs, according ‘to’the 
magnitude of the faid fphres and the quantity of this diminu- 
tion may be eafily found in the following manner : Suppofe'S 
to teprefent the femi-diameter of the fun, and aS’to ‘réprefent 
the femi-drameter of the propofed fphere; then, as appéars 
from what has been fhewn before, the fquare ‘root of the dif- 
ference between the fquare of 497 S’and the fquare of aS will 
be always proportional to the ultimately remaining velocity, 
after it has fuffered all the diminution, it can poflibly fuffer 
from this caufe; and confequently the difference between the 
whole velocity of light, and the remaining velocity, as found 
above, will be the diminution of its velocity. And ‘hence the 
diminution of ‘the-velocity “of light emitted from the’ fun, on 
account of it’s gravitation towards that body, will be fome- 
what lefs than a 494.000dth part of ‘the velocity. which it 
would have had if no fuch diminution had taken -place; for 
the fquare of 497 being 247.009, and the ‘fquare of 1 being 1, 
the diminution of the velocity will be the difference between 
2 the 
“ 
