END OF THE LAST STAGE.Rulecopied.384. Theruleunderneath, consisting of 3 Preceptsonly, is laid down bySir George Shuckburgh, in the Transactions for 1777, Page 574, in order to ascertain the Height of Mountains, &c. (SeeSection 349).[127]1st. Step, in Section 353.385. Recapitulation for each Step of the Work, in the first Example; referring to the Sections.2d. Step, in Section 354.Below. Barometer, Inches 29, .4 Tenths.Attached Thermometer, 50 Degrees, Air-Thermometer 45°.3d. Step, in Section 355.Above. Barometer, Inches 25, .19 Tenths.Attached Thermometer 46°, Air Thermometer, 29°1⁄2.From 50°subtract46——and there remains 4Degrees of Temperature to be added to the colder Barometer.4th Step, in Section 356.By Means of the first Table, find the Expansion of thecolderBarometer, with Degrees of Heat, viz. 4° on Inches 25, .19,gradually, thus:5th Step, in Section 364.6th Step, in Section 366.with 4° on 25.= .0101with 4° on.19= .0000076—————————25.2|Upper Barometer, Inches 25, .2 Tenths.Lower Barometer,29, .4End of the first Stage.7th Step, in Section 368.By Means of the 2d Table, find the corresponding Heights in the Air, at 31°. 24.8th Step, in Section 371.25, .2Answer6225.029, .42208.0———The Remainder is4016.8Height in Feet, &c.9th and 10th Steps, in Section 373.The 3d Table, or Table forHeightsin the Atmosphere corresponding to theTenthof an Inchonthe Barometer, including the 9th and 10th Steps, is useless in this first Example.End of the Second Stage.11th Step, in Section 376.Detached Air-Thermometer,above,291⁄2Dittobelow,45°——Whole Heat2)841⁄2Half Heat or mean Temperature431⁄4Deduct Standard311⁄4———Moiety above Standard11°12th step, in Section 377.By Means of the 4th Table, find theExpansion of Air, with 11° on4106.8Feetviz.107.3———which added to the same Height gives4124.1for thetrue Height, in English Feet, of theMountain, orupper Station, sought.End of the last Stage.
END OF THE LAST STAGE.
Rulecopied.
384. Theruleunderneath, consisting of 3 Preceptsonly, is laid down bySir George Shuckburgh, in the Transactions for 1777, Page 574, in order to ascertain the Height of Mountains, &c. (SeeSection 349).[127]
1st. Step, in Section 353.
385. Recapitulation for each Step of the Work, in the first Example; referring to the Sections.
2d. Step, in Section 354.
Below. Barometer, Inches 29, .4 Tenths.
Attached Thermometer, 50 Degrees, Air-Thermometer 45°.
3d. Step, in Section 355.
Above. Barometer, Inches 25, .19 Tenths.
Attached Thermometer 46°, Air Thermometer, 29°1⁄2.
From 50°
46
——
and there remains 4
4th Step, in Section 356.
By Means of the first Table, find the Expansion of thecolderBarometer, with Degrees of Heat, viz. 4° on Inches 25, .19,gradually, thus:
5th Step, in Section 364.
6th Step, in Section 366.
—————————
25.2|
End of the first Stage.
7th Step, in Section 368.
By Means of the 2d Table, find the corresponding Heights in the Air, at 31°. 24.
8th Step, in Section 371.
25, .2
Answer
29, .4
The Remainder is
9th and 10th Steps, in Section 373.
The 3d Table, or Table forHeightsin the Atmosphere corresponding to theTenthof an Inchonthe Barometer, including the 9th and 10th Steps, is useless in this first Example.
End of the Second Stage.
11th Step, in Section 376.
291⁄2
45°
——
2)841⁄2
431⁄4
311⁄4
———
11°
12th step, in Section 377.
4106.8
viz.
107.3
———
4124.1
End of the last Stage.