324 Capt. Kater’s account of the re-measurement of 
Second trial. 
1 39 mean. 
The reading of the micrometer when the rule was placed 
in the square was 51,3 ; the diameter of the sphere, therefore, 
exceeds the rule 12,3 divisions. 
Third trial . 
js 8 >43 mean. 
The readings of the micrometer when the rule was placed 
in the square were 
5*.7l 
5i.3 1 
> 51,25 mean. 
ShSI 
5° >5 j 
By this last trial, the diameter of the sphere exceeds the 
rule 12,82 divisions. 
Diameter of 
the Sphere. 
Readings 
of the 
Micrometer. 
A to B 
C toD 
E to F 
38 
3 8 >3 
39 
Diameter of 
the Sphere. 
Readings 
of the 
Micrometer. 
A to B 
C to D 
E to F 
38 
39,2 
39,8 
