342 
MR. H. J. CHANEY’S RE-DETERMINATION OF 
Height (ii — h', fig. 1). Centre. 
Mean reading of ' 
Date. 
t. 
Whitworth 
17-34. 
micrometer for 
1888. 
Fahr. 
standard 
9-inch bars. 
div. 
div. 
November 1 .... 
62-5 
509-5* 
486 0 
„ 5 . . . . 
63-2 
506-7 
484-5 
„ 7 ... . 
61-5 
512-1 
484-9 
8 ... . 
62-1 
506-9 
483-8 
„ 13 .... 
63-0 
506-5 
484-5 
Mean = 
62-46 
508-34 
484-74 
At 62° Fahr. the mean height of the cylinder C was therefore taken at 9‘00202 
inches. 
* Ten consecutive micrometer readings on November 1 (t = 62*5°), gave a result by one observer as 
follows:— 
509'8 div. 
•7 
•0 
•5 
2 
6 
6 
6 
5 
509-4 
509 - 5 Mean. 
