R = B + Gs/(G + s) + r

would serve for the total resistance, R, of an electric circuit, upon

giving the letters the significations adopted.

[Illustration: FIG. 4.]

Such is, in brief, the present state of the question. The scientific

bodies that have taken hold of it have not as yet furnished a fully

co-ordinated work on the subject. Let us hope, however, that we shall not

have to wait long. The question is of as much interest to scientific men

as to practical ones.

A collection of identical symbols would have the advantage of permitting

us to abridge explanations in regard to the signification of terms used

in mathematical formulas. A simple examination of a formula would suffice

to teach us its contents without the aid of tiresome explanatory matter.

But in order that the language shall be precise, it will be necessary for

the words always to represent precise ideas that are universally

accepted, and for their sense not to depend upon the manner of

understanding the idea according to their arrangement in the phrase.

Nothing can be more desirable than that the societies of electricians of

all countries shall continue the study of these questions with the desire

of coming to a common understanding through a mutual sacrifice of certain

preferences and habitudes.--_E. Dieudonne, in La Lumiere Electrique_.

* * * * *

Scientific American Supplement, No. 595, May 28, 1887 · 第 24 / 39 题