5. For the Place of a _Decimal_, in the Question, (viz. .8) the decimal Point, in the Answer, must be removed over _four_ Figures, or Places to the left, by adding a Cypher: and for the Place of each further Decimal in the Question;—_one_ Place more in the Answer, by the further occasional Addition of a Cypher, thus: _on_ Feet 4000, the Ans. 106.92 is still 106.92 10 26.73 becomes .2673 6 160.38 .16038 .8 213.84 .021384 —————————— 107.369064 383. Which Sum, by rejecting all but the first Decimal, in the Answer, is Feet 107.3 Tenths equal to the Expansion of Air, _with_ 11° of Heat, _on_ 4016.8 Feet, the Height of the upper Barometer, with the Temperature of 31°.24, according to the 2d Table. END OF THE LAST STAGE. * * * * * [Sidenote: +Rule+ copied.] 384. The +rule+ underneath, consisting of 3 Precepts _only_, is laid down by Sir George Shuckburgh, in the Transactions for 1777, Page 574, in order to ascertain the Height of Mountains, &c. (See Section 349).[127] [Sidenote: 1st. Step, in Section 353.] 385. Recapitulation for each Step of the Work, in the first Example; referring to the Sections. [Sidenote: 2d. Step, in Section 354.] Below. Barometer, Inches 29, .4 Tenths. Attached Thermometer, 50 Degrees, Air-Thermometer 45°. [Sidenote: 3d. Step, in Section 355.] Above. Barometer, Inches 25, .19 Tenths. Attached Thermometer 46°, Air Thermometer, 29°½. From 50° subtract 46 —— and there remains 4 Degrees of Temperature to be added to the colder Barometer. [Sidenote: _4th Step, in Section 356._] By Means of the first Table, find the Expansion of the _colder_ Barometer, with Degrees of Heat, viz. 4° on Inches 25, .19, _gradually_, thus: [Sidenote: 5th Step, in Section 364.] with 4° on 25. = .0101 with 4° on .19 = .0000076 ———————————————— 25.2| [Sidenote: 6th Step, in Section 366.] Upper Barometer, Inches 25, .2 Tenths. Lower Barometer, 29, .4 _End of the first Stage._ [Sidenote: _7th Step, in Section 368._] By Means of the 2d Table, find the corresponding Heights in the Air, at 31°. 24. [Sidenote: 8th Step, in Section 371.] 25, .2 Answer 6225.0 29, .4 2208.0 —————— The Remainder is 4016.8 Height in Feet, &c. [Sidenote: _9th and 10th Steps, in Section 373._] The 3d Table, or Table for _Heights_ in the Atmosphere corresponding to the _Tenth_ of an Inch _on_ the Barometer, including the 9th and 10th Steps, is useless in this first Example. _End of the Second Stage._ [Sidenote: 11th Step, in Section 376.]