Specimen.
Coincidences were marked—
| At 32 | seconds. | |
| 37 | seconds. | |
| 43.5 | seconds. | |
| 49 | seconds. | |
| 54.5 | seconds. | |
| 61.5 | seconds. | |
| 61.5 - 32 | = 29.5. | |
| 29.5 ÷ 5 | = 5.9 = | time of one interval. |
Résumé.
| 1 | 5.9 | |
| 2 | 6.2 | |
| 3 | 6.2 | |
| 4 | 6.2 | |
| ---- | ||
| Mean = | 6.13 | = time of one interval between coincidences. |
In this time the watch makes 6.13×5 = 30.65 beats, and the forks make 30.65 + 1 = 31.65 beats.
Hence the number of beats per second is 31.65 ÷ 6.13 = 5.163.
Specimen.
Circumstances the same as in last case, except that standard Vt3 fork was allowed to trace its record on the lampblacked paper, as in finding its rate of vibration.
Coincidences were marked at—