314 
MR. AIRY’S ACCOUNT OF THE HARTON EXPERIMENT 
end). The mean of the first retained and the last retained being taken, the difference 
of means divided by the number of Intervals gave a very exact value of Mean 
Interval. 
In the Interval, the detached pendulum lost two vibrations on the clock pendulum. 
If then the times of the first and last mean be taken from the cloch-face, and if n be 
the number of seconds, referred to the clock, in the Mean Interval, the rate of the 
detached pendulum on the clock pendulum will be The following Tables con- 
7t 2 
tain all the values of log which are required here. For estimating the effect of 
any error in the Interval, it should be remembered that the logarithm of orof 
a rate of one second daily, is 500 in the last figures of 8-figure logarithms, nearly. 
w. 
-r n— 2 
Log 
n 
n. 
T n — 2 
Log • 
n 
n . 
T n — 2 
Log 
n 
T n — 2 
Log • 
n 
w. 
r n —2 
Log 
n 
293-0 
9-99702537 
300-0 
9-99709501 
376-0 
9-99768376 
392-0 
9-99777854 
405-0 
9-99785003 
•1 
2639 
-1 
9598 
•1 
8438 
•1 
7911 
-1 
6056 
•2 
2740 
•2 
9695 
•2 
8499 
-2 
7967 
-2 
5109 
•3 
2842 
-3 
9792 
•3 
8561 
•3 
8024 
-3 
5162 
•4 
2943 
-4 
9889 
•4 
8622 
•4 
8080 
-4 
5215 
•5 
3045 
•5 
9-99709986 
•5 
8684 
-5 
8137 
-5 
5268 
•6 
3146 
•6 
9-99710083 
•6 
8746 
•6 
8194 
-6 
5321 
•7 
3248 
•7 
0179 
-7 
8807 
•7 
8251 
•7 
5374 
•8 
3349 
-8 
0276 
•8 
8869 
•8 
8307 
-8 
5428 
•9 
3451 
•9 
0372 
•9 
8930 
-9 
8364 
•9 
5481 
294-0 
3552 
301-0 
0469 
377-0 
8992 
393-0 
8421 
406-0 
5534 
•1 
3653 
-1 
0565 
-1 
8477 
-1 
5587 
-2 
3754 
*2 
0662 
389-0 
9-99776137 
-2 
8534 
-2 
5639 
•3 
3856 
-3 
0758 
•1 
6194 
•3 
8590 
-3 
5692 
•4 
3957 
-4 
0855 
•2 
6252 
-4 
8647 
-4 
5744 
-5 
4058 
•5 
0951 
-3 
6309 
-5 
8703 
-5 
5797 
•6 
4158 
-6 
1047 
•4 
6367 
-6 
8759 
-6 
5850 
•7 
4259 
•7 
1143 
•5 
6424 
■7 
8816 
•7 
5903 
•8 
4359 
•8 
1239 
-6 
6482 
•8 
8872 
-8 
5955 
•9 
4460 
•9 
1335 
•7 
6539 
•9 
8929 
•9 
6008 
295-0 
4560 
302-0 
1431 
•8 
6597 
394-0 
8985 
407-0 
6061 
-9 
6654 
-1 
6114 
298-0 
9-99707545 
374-0 
9-99767134 
390-0 
6712 
403-0 
9-99783932 
-2 
6166 
•1 
7643 
-1 
7196 
'1 
6769 
•1 
3986 
-3 
6219 
-2 
7741 
•2 
7258 
•2 
6827 
-2 
4040 
-4 
6271 
•3 
7840 
-3 
7321 
•3 
6884 
-3 
4094 
-5 
6324 
-4 
7938 
-4 
7383 
-4 
6942 
•4 
4148 
-6 
6377 
-5 
8036 
•5 
7445 
•5 
6999 
-5 
4202 
•7 
6429 
-6 
8134 
-6 
7507 
•6 
7056 
-6 
4255 
-8 
6482 
•7 
8232 
•7 
7569 
•7 
7113 
•7 
4308 
•9 
6534 
•8 
8330 
•8 
7632 
•8 
7170 
•8 
4362 
408-0 
6587 
•9 
8428 
-9 
7694 
•9 
7227 
•9 
4415 
-1 
6639 
299-0 
8526 
375-0 
7756 
391-0 
7284 
404-0 
4468 
-2 
6692 
-1 
8624 
-1 
7818 
•1 
7341 
•1 
4522 
-3 
6744 
-2 
8722 
•2 
7880 
-2 
7398 
•2 
4575 
-4 
6797 
-3 
8819 
•3 
7942 
•3 
7456 
•3 
4629 
-5 
6849 
-4 
8917 
•4 
8004 
•4 
7513 
•4 
4682 
-6 
6901 
-5 
9015 
•5 
8066 
•5 
7570 
•5 
4736 
•7 
6953 
-6 
9112 
-6 
8128 
•6 
7627 
•6 
4789 
-8 
7006 
•7 
9209 
•7 
8I9O 
•7 
7684 
•7 
4843 
-9 
7058 
-8 
9307 
-8 
8252 
•8 
7740 
•8 
4896 
409-0 
7110 
-9 
9404 
•9 
8314 
'9 
7797 
•9 
4950 
