And lastly, with that difference, find by the 3d Table, the Height at the Standard-Heat, corresponding to the remaining Decimals above the upper Barometer.
| 421. (1st.) From the lower Barom. viz. | 30.082 |
| Subtract the upper | 29.9865 |
| ——— | |
| Remaining Decimals above the upper | .0955 |
2d. Find, by the 2d Table, the Height corresponding to the Inches, and nearest Tenth above and below the Point at which the Quicksilver rests in the lower Barometer.
The Inches and nearest Tenth is
| above 30 Inches, correspond. to Feet | 1681.7 |
| and below 30.1, corresponding to | 1595.0 |
| ——— | |
| 86.7 |
which is the difference of .1 below 30.1.
Lastly. Find, by the 3d Table, with the difference, viz. 86 Feet, on the remaining Decimals, for the Height, in Feet, corresponding to the Standard-Heat.
| viz. | .09 | 77 | = | 77. Feet. |
| .005 | 43 | = | 4.3 | |
| .0005 | 43 | = | .43 | |
| ——— | ||||
| Answer, Height in Feet | 81.73 | |||
corresponding to .0955 above Inches 29.9865 Tenths of an Inch, of Quicksilver in the upper Barometer thus brought to the Standard-Heat.
422. Prepare for Expansion of Air from Excess above Standard-Heat, on the same Number of Feet: