CHAPTER LXXVIII.
PRACTICE OF THE FOURTH EXAMPLE,[134] FOR MEASURING SMALL HEIGHTS.
By this Example, small Heights are easily measured.
Section 419.
| Attached Therm. below, | 71°.0 |
| Attached Therm. above, | 70 .5 |
| —— | |
| Subtract, and there remains | .5 |
Tenths of a Degree of Heat to be added to the colder Barometer (which in the present Case is the upper, but might possibly have been otherwise) by the 1st Table.
First, with 0°.5 on 29 Inches. To obtain which, begin
| with 1°.0 on 29 Inches | = .002: |
| with 0°.1 above 1°, on 29 | = .0002: then |
| with 0°.5 above 1°, on 29 | = .001. |
Prepare it for Addition to the colder Barometer.