$20 Capt. Kater’s account of the re-measurement of 
Measurement of the cylinder. 
Each of the ends of the cylinder was crossed by Sir G. 
Shuckburgh by two diameters, the extremities of which were 
connected by lines drawn parallel to its axis. These lines, as 
well as the letters indicating their terminations, were dis- 
tinctly visible. 
Length of the cylinder . 
The brass pieces being properly arranged, the excess of the 
distance between the dots and 6 inches, taken upon the scale 
between 52,1 and 58,1 was measured, which being added to 
6 inches, and ,0296582 deducted, we obtain the length of the 
cylinder. 
Cylinder. ( Length . ) 
Reading of the 
Micrometer at the 
Difference. 
Distance 
between the 
Dots in Inches, 
Length 
of the Cylinder 
in Inches. 
Mean. 
Scale. 
Dots. 
a to a 
3>2 
264,5 
261,3 
6,0254925 
5-9958343 
b to b 
3 
27°, s 
267,5 
6,0260973 
5,9564391 
c to e 
> 5,996*9 
3 
270 
267 
6,0260485 
5,9963903 
dtod 
3 
267 
264 
6,0257558 
5,9960976 
a to a 
5, 5 
263,5 
258 
6,0251705 
5 , 995 S ‘ 2 3 
b to b 
3>2 
270 
266,8 
6,0260290 
5,9963708 
c to c 
6,5 
268 
261,5 
6,0255120 
5,9958538 
^ 5 - 9959 ° 
dtod 
3-5 
265 
261,5 
6, 0255120 
5 - 995 8 538 
. 
J 
a to a 
1 
260 
259 
6,0252681 
5,9956099 
- 
b to b 
1 
266 
265 
6,0258534 
5,996*952 
c to c 
>■ 5 , 9959 ° 
0 
264 
264 
6,0257558 
5,9960976 
d to d 
1 
261 
260 
6,0253656 
5,9957074 
-< 
The mean of these three means being taken, we have 
5,99600 for the length of the cylinder. 
