BinAvayva Mountains. 951 
tion from the two arcs was only ‘005 inches. The rods of each pair, were 
now placed interlocking as they would be in the measurement. In the pair 
1.2—92.3 it was found that the line on 2.3 which was most convenient for 
comparing with the Nonius, was *707 short ef the mark, defining the limit 
of 300°966inches. ‘This line therefore marked the extent of 300259 inches; 
again the 301 inches being marked in 1.2 by the division 16-109, it is evi- 
dent that the division 16 marked the termination of 301 —- "2 — 300-973 
inches. Adding these,  300°973 
300°259 
sD 
The sum is 601 ‘232 which 3 is ther shore the value of this pair 
of rods when placed inter locking, and the zero mark of 2.3 corresponding 
with the 16-000 division of 1.2. _ To find the division corresponding to 600 
inches, or 50 feet, deduct 1-232 inches = 4-928 divisions, which gives us 
11-072, also the 11th division answers to 599-982 inches. 
33. For the other pair it was found that the zero line of 4,5 was 1:947 
from the mark, forming the limit of 300°917 inches. ‘The zero line there- 
fore was the measure of 298°970 inches. Now on the 3.4 rod it has been 
seen, that the division 1-493 marked the extent of 200-856 inches, the first 
division therefore marked, 300-979 
398:970 
Sum, 599-949 
VOL. XI¥. 35 
