.260 
DR. J. YOUNG AND PROFESSOR G. FORBES ON THE 
December 21, 1880, No. 5. 
Wheel. 
Clock. 
Reading. 
Differences. 
At mean reading. 
Reading. 
Alternate 
differences. 
Alternate second 
differences. 
1,197 
3,161 
7,104 
1,964 
1,972 
2,179 
5,133 
7,953 
17,419 
24,695 
41,143 
50,225 
57,271 
16,742 
(16,448) 
16,128 
294 
320 
Signal at 3,482 
Signal at 33,692 
F=‘001968 
7=32,958 
4/= 308 
7= -8224 
Correction for friction, &c. = — ‘0006 
«= ‘8218 
«=-,=417-58 
F 
December 21, 1880, No. 6. 
Wheel. 
Reading. 
Differences. 
At mean reading. 
8,448 
10,558 
14,723 
2,110 
2,083 
9,503 
12,641 
Signal at 12,241 
F=-002086 
n'—— =469‘14 
v 
Clock. 
Reading. 
Alternate 
differences. 
Alternate second 
differences. 
5,952 
14,799 
19,866 
25,818 
19,699 
339 
34,498 
(19,527) 
282 
45,345 
19,417 
53,915 
Signal at 32,524 
s=35,616 
4/= 285 
v= ‘97640 
Correction for friction, &c. = + ‘00224 
v- ‘97864 
2m ( n + n 'l^? = 188,484 
y* * 
* =0‘999583 
Product =V= 188,405 
From Nos. 5 and 6 
Correction for second term = — 79. 
