| Detached Air-Thermometer, above, | 291⁄2 |
| Ditto below, | 45° |
| —— | |
| Whole Heat | 2)841⁄2 |
| Half Heat or mean Temperature | 431⁄4 |
| Deduct Standard | 311⁄4 |
| ——— | |
| Moiety above Standard | 11° |
12th step, in Section 377.
| By Means of the 4th Table, find the Expansion of Air, with 11° on | 4106.8 | Feet |
viz. | 107.3 | |
——— | ||
| which added to the same Height gives | 4124.1 | for the |
| true Height, in English Feet, of the Mountain, or upper Station, sought. | ||
End of the last Stage.
CHAPTER LXXV.
PRACTICE OF THE SECOND EXAMPLE:
With a distinct View of the Work. (Ph. Tr. for 1777, Page 579.)
Section 386. THE Point at which the Quicksilver stood in the Tube of the Barometer on the Mountain, or in the Car of the Balloon, being Inches 24.178 Tenths; its attached Thermometer, Degrees 57.2 Tenths, and its Air-Thermometer 56°; while the Barometer on the Ground stood at Inches 28, .1318 Tenths; its attached Thermometer, Degrees 61, .8 Tenths, and its Air-Thermometer 63°, .9; what is the Height of the upper Station?
1st. Step.