io8 
Mr . Topping's Account of the Measurement 
Table of the measures, with their corrections, of the six 
hypothenusal lines. 
Inch. Inch. 
Note, the error of the rod A was o, i o -j- , of B o, 1 2 -f . 
Distances and number of double 
rods between the stations. 
Measured lengths 
in feet, &c. 
Corrections ; 
subtractive. 
Correct length of 
each hypothenuse. 
D. Rods. Feet. Inches. 
Feet. Inch. Dec. 
Feet. Inch. Dec. 
Feet. Inch. Dec. 
Between N signal 
and 1st flag 
9 4 
73°9 4 0 
2 8l 
7306 7 9 
Between 1st and 2d 
flags 
170 37 6 
8537 6 0 
3 1 5 
8 534 4 5 
Between 2d and 3d 
flags 
106 11 6 
531 1 6 0 
111 4 
5309 6 6 
Between 3d and 4th 
flags 
83 10 3 
4160 3 0 
164 
4158 8 6 
Between 4th and 
5th flags 
93 8 2 
4658 2 0 
M 
00 
Or 
4 6 5 6 5 5 
Between 5th flag 
and south, signal 
100 43 5,7 
5043 5 7 
1 IO 2 
5 ° 4 * 7 5 
Total effect 
of error, 
12 10 1+ 
