BY W. ADDISON, ESQ.
149
Ditto, August 9th, 1834.—Second series.
| Library House. | Baro. | Attach. Therm. | Detach. Therm. | Hyg. | Time. (p. m.) |
Wind | Weather. |
| Going up | 29.452 | 67.0 | 66.5 | 59.0 | 6 | North. | Cloudy, fine. |
| Return | 29.545 | 64.0 | 58.0 | 8 | N. W. | Ditto | |
| Mean | 29.43 | 65.5 | 65.2 | 58.5 | 7 | ||
| Summit of the beacon | 28.550 | 58.0 | 58.0 | 52.0 | 7 10 | High N. W. | Clouds moving from the east. |
The barometer employed was that described at p. 16 of the preceding communication; and by using the same instrument at both stations, any correction for capillary depression is rendered unnecessary. In the following preliminary observations a. different barometer, carefully boiled, measured and adjusted, was used at the summit of the beacon, the bore of the tube being .150 in. in diameter, so that here the correction for capillarity must not be overlooked.
August 5th, 1834.—Third series.
| Lower station. | Diam of the bore. | Baro. | Attach. Therm. | Detach. Therm. | Hyg. | Time. (p. m.) |
Wind | Weather. |
| Setting out | 29.331 | .250 | 67.0 | 62.0 | 58.0 | 5 40 | Westerly, moderate | Dark heavy clouds. |
| Return | 29.325 | —— | 65.0 | 62.0 | 60.0 | 7 30 | Westerly, light. | Cloudy, fine. |
| Mean | 29.328 | —— | 66.0 | 62.0 | 59.0 | 6 35 | ||
| Summit of the beacon | 28.300 | .150 | 58.0 | 58.0 | 57.0 | 6 30 | High S. W. | Light, shower, lower clouds just over head, dark cloudy |
The following is a tabular view of the results.—Height of the Worcestershire Beacon, above the Library.
| Deduced by Maskelyne's formula. | Deduced by Hutton's formula. | Deduced by Daniell's formula. | |
| First series of observations. | 921.0 | 910.8 | 924.0 |
| Second ditto | 934.5 | 927.8 | 925.5 |
| Third ditto | ——— | ——— | 917.0 |
| Third ditto | 927.7 | 919.3 | 922.1 |
Mean of all—923 feet, the height of the Worcestershire Beacon above the Library at Great Malvern.
