On the Deduction of Increase–Rates from Physical and other Tables

Abstract

THE problem treated by Prof. Everett in your issue of July 20, p. 271, allows a somewhat simpler solution. Take the example given by Prof. Everett. To find the vahie of at the temperature 105°, we have only to consider the columns for Δp, Δ³p, Δ ⁵p, &c. In each of these columns there are two numbers, one just above and one just below the horizontal line, corresponding to the value ф = 105°. In the column for Δp, for instance, these two numbers are 408 and 470, in the column for Δ³p they are 5 and 8 If now m₁, m₃,m₅, &c, are the means of each of these two numbers, so that in this case m₁ = 439, m₃= 6.5 we have: