Abstract
IN this book we have a very good elementary exposition of the Doctrine of Energy; perhaps, however, better adapted for the use of schools than for the general public. Indeed, we are told in the preface that the work was developed from a set of lectures given to the senior classes of Surrey County School. In his discussion of fundamental units the author makes some very good and original remarks. He tells us, for instance, in connection with the first law of motion, that “the rate and the direction of motion with and in which (respectively) a bo dy is moving at any moment is to be considered as part of its actual condition at that moment, which it will retain until some adequate cause changes either the velocity or the direction, or both. We may reasonably inquire how it got the motion it has, as we may how it came by its shape or its temperature; and again, under what circumstances it will change any of these properties; but not why, having got them, it keeps them.”
An Elementary Exposition of the Doctrine of Energy.
By D. D. Heath, formerly Fellow of Trinity College, Cambridge. (Longmans, Green, and Co.)
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Our Book Shelf . Nature 12, 65 (1875). https://doi.org/10.1038/012065a0
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DOI: https://doi.org/10.1038/012065a0