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?

387. 1st. Step. Set down the Observation on the Ground, thus:

Below, Barometer, Inches 28, .1318 Tenths,

Attached Thermometer, Degrees 61, .8 Tenths.

Air-Thermometer, 63°, .9.

388. 2d. Step. Set down the Observation, on the Mountain, or in the Car, thus:

Above, Barometer, Inches 24, .178 Tenths.

Attached Thermometer, Degrees 57, .2 Tenths.

Air-Thermom. 56°.

389. 3d. Step. From the warmer attached Thermometer, subtract the colder, thus:

61°, .8

57,  .2

———

4,  .6

390. 4th. Step. Give the colder Barometer the same Expansion, viz. 4°, .6 with the warmer, by the first Table.