18 OCTOBER 1890, Page 27

Electric Potential. By Dr. Turnlirz Translated by D. Robertson. (Rivingtons.)—Dr.

Tumlirz, in view of the wants of those who wished to see the theory of "Potential" treated from the physical as well as the mathematical standpoint, has "popularly" treated "Potential," and the result is a most convenient little book, with only a fair proportion of mathematics, and one which is sure to be gladly welcomed by the ordinary student. It contains a great deal in a small compass, and expressed in such a manner as may afford some help to the student of electrical phenomena, and may indicate what help there is to be derived from the consideration of potential. The translator has been assisted by Professor Carey Foster.