| Inches 25.19 Tenths | |
| with 4° on 25 | .0101 Expansion |
| with 4° on .19 | .0000076 Expansion |
| —————— | |
| The Answer is 25.2|001076, | |
viz. the Point at which the Quicksilver woud stand, in the coldest Barometer, when equally expanded, i. e. of the same Temperature with the warmer. Reject all but the first Decimal as too minute: this is seen by a Line drawn between the first and second Decimal.
Practice will shew how far to proceed, without computing the decimal Parts of an Inch, to more than 4 Places; but it is always more exact, to follow minutely the above Rules.
CHAPTER LXXII.
Section 365. HAVING therefore understood the Foundation, Construction, and Use of the first Table; in the present Case, having also added the decimal Parts of an Inch just found, for the Expansion,—to the Inches and Tenths, expressing the colder Barometer; which will then have the same Expansion, or Temperature with the warmer, thus;
| Inches. | |
|---|---|
25.19 | colder Barometer: |
.0101 | Expansion on the same, in Parts of an Inch with 4° of Temperature, (rejecting all but the first Decimal as too minute,) |
———— | |
25.2|001 | added; this Sum will express the Point at which the Quicksilver in the colder Barometer woud stand, when equally expanded, i. e. in the same Temperature, with the warmer. |
366. 6th Step. Place both Barometers, now of equal Temperature with the warmer, together, first, the upper Barometer; and under it the lower, thus:
Inches 25. 2 Tenths.
29. 4
END OF THE FIRST STAGE.