322 Capt. Kater’s account of the re-measurement of 
Cy Under. ( Diameter. ) 
End i. 
Reading of the 
Micrometer at the 
Difference. 
Distance 
between the Dots 
in Inches. 
Diameter 
of the Cylinder 
in Inches. 
Mean. 
Scale, 
Dots. 
42,6 
43>4 
a to b 
316,5 
c to d 
3 i6 ? 5 
273.9 
273 ** 
4,02672168 
4,02664364 
3,9970635 
3,9969854 
J 3.99702 
End 2. 
43 
42 
a to b 
3 * 7*7 
c to d 
3*9 
274.7 
2 77 
4,02679973 
4,02702412 
3 * 997 * 4*5 
3,9973669 
| 3 . 9972 S 
The mean of these measurements scarcely differs from that 
of the former. We have then the diameter of the cylinder, 
by the ist measurement - 3,997 12 
by the 2nd, - 3’997*4< 
Mean - 3 ’997*3 
The length being 5,996 00, and the diameter 3,997 1 3 > 
capacity of the cylinder will be 75,2398 inches. 
Measurement of the sphere. 
On referring to Sir George Shuckburgh’s account, it will 
be seen, that for the measurement of the sphere, a brass 
square was employed, the side of which was a very little 
longer than the diameter of the sphere. The sphere being 
placed within the square, and properly supported, a micro- 
