c , o 16 S 
J { fSSB 
to ascertain a Standard of fVeight and Measure. 147 
Inches. Inches. 
The diameter a b = 4 — ,0027 === 3,9973 T 
c d = 4 — ,0024 = 3,997 6 J 
/ 
End 2. of the Cylinder . 
Inches. Inches. 
The diameter a 6 = 4, — ,0014 = 3,9986 1 
c d = 4 — ,0029 = 3,9971 J"T 
Mean. 
Inches. 
= 3.99745 
3.997 8 5 
Height of the Cylinder . 
The microscope and micrometer being placed respectively 
at 52,1 inches and 58,1 inches, viz. at the interval of exactly 6 
inches on the scale, I found 
Inches. Inches. Mean. 
The height from a to a = 6 — ,0049 = 5,995 1 
btob = 6 — ,0047 = 5’9953 
c to c = 6 — ,0047 = 5,9953 1 _i nches - 
d to d z=z 6 — ,0054 
f 58 > 
Repeated - | 
f = 5>995°2f 
5>9944 
Now the mean diameter of the cylinder having been found 
Inches. 
at the end 1 = 3,99745 -A. 
at the end 2 = 3,99785 3 
The factor for the square of thel 
diameter of a circle, to find the >= 0,7854 <*r o 2ftS 
area, being, as is well’ known J 
And the height of the cylinder =5,9950 or or, ft*r Syy 50 2S 1 
The above four quantities, multiplied into each other, give 
for the contents of this cylinder, in inches, = 74,94823; and 
this result may be taken at least as correct as that of the cube, 
viz. to about the third place of decimals. 
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