Exercises in Electrical and Magnetic Measurement

Abstract

MR. DAY'S little book on Electrical and Magnetic Measurement seems to us likely to be of considerable service both to teachers and to students. The best proof of knowledge of any branch of physics, and the most practical result of the study of any such branch is the acquisition of the power of applying numerical calculation to every question where a numerical result can be obtained. The student knows that he understands a subject thoroughly when he can write down numbers to express definitely the amount of every effect observed and measured by experiment. The importance of numerical calculations in absolute measure is becoming daily more and more appreciated: and in the best English text-books numbers expressing quantities in absolute measure are now to be found, instead of the relative numbers that were alone obtainable from the text-books of only a few years ago. Mr. Day's book brings very fairly together such questions as are likely to present themselves to the student of electricity and magnetism. Anyone who has acquired sufficient knowledge to work through a considerable pait of the exercises cannot fail to find them extremely useful.

Exercises in Electrical and Magnetic Measurement.

By R. E. Day (London: Longmans, Green, and Co., 1876.)