250 AN ACCOUNT OF THE 
proportional to the distance of their axis, or rather of the line of divisions 
/ parailel to their axis. : 
Ox the 3.4 rods, this imaginary line was found to be from the 1.9 are 
8665 inches== 1-466 divisions. ‘These are intersected. at, 
5 tae ah 100. Be 
G0S5 iq 0) ai athe. 
Add, i466 - ; HO BIW re ols: 
The defining linc intersected at, 1501 ¥-4860 : 
Tur mean of these which only differ 004 inch is 1493, the division on 
which, the imaginary line would cut 3.4. But this fequires a correction ag 
above indicated, which is found to be nearly “031 inch. Now the length 
of 2.3 as defined by this line was, - 300-966 
Add, = 4+048= 9 °031 
50 
300:997 
Deduct languette, "141 
Length of rod.as defined, . 300-856 eee 
By the division, : 1-493 Comparator bemg 1203. 
52. In the same manner was the length of 4.5, found to be (as limited 
by a certain mark) 300919 inches. ‘The: difference of the determina- 
