164 Sir George Shuckburgh Evelyn’s Endeavours 
Which, I think, may fairly be presumed to be within 1 part 
in 50,000 of the truth. 
(§. 31.) Now the contents of this sphere having already 
(§. 28.) been found to be = 113,519 cubic inches; 
= 252,587 grains, will be the weight of a cubic inch of dis- 
tilled water, under the circumstances above mentioned, by Mr, 
Troughton’s weights.* 
I think it may now be concluded, that the variety in the 
experiments of the cylinder and the cube, (§. 24.) does not 
proceed from the different depths ■f* in the water, at which they 
were made ; at least, that the pressure of 3 inches, in perpen- 
dicular height of water, does not render that fluid more dense 
by -i- part, which may be reckoned an insensible quantity ; 
but that this variety did proceed from a difference in the yield- 
ing of the sides of the cube and the cylinder. And lastly, I 
hope it may be trusted, that the weight of a bulk of water 
2S2-422J fjn = 
it'' /i '' ' ■' ' r ' 
4. Bv means of an alteration and addition to my apparatus, since the experiment 
* dir * 4 ' v * r ? J 
abovementioned was made, I have been able to repeat it at greater depths below the 
... . . 
* But, as will appear hereafter, (§. 41.) these weights are too light, when com- 
pared with the standard in the House of Commons, by about 1 in 1523,92; the 
correction therefore, for this difference, would be — 0,165 grain, to be deducted 
from - - - - - 252,587 grains. 
— ,165 
And the weight of a cubic inch of distilled water, in grains of ^ 
the parliamentary standard, will be - - J 
252,422 
A 07 1- 
' //it 
' J 
./ 
P /X 
00,70 t > 
C /'$//? 8 A 
surface of the water, viz. when the centre of the sphere was 5 inches, 13 inches, and 21 
inches, below, without any appearance of water having a sensible difference of density at 
different depths. The vessel I used for this purpose was of wood, 32 inches high, and 
12 square, containing 16 gallons, with two sides of plate-glass, to admit the light ; and 
the wires by which the sphere was suspended were 45 inches long, and stronger than 
before, viz. 100 inches of the single wire weighed 24,14 grains; and due allowance 
was made for the different weight of the scale and wires, in air and water, from actual 
experiment. 
5*77 3 / / 
r 
