A Treatise on Electrical Theory and the Problem of the
Universe. By G. W. de Tunzelmann. (Charles Griffin and Co. 15s. net.)— We must be content with a very brief notice of this work. Its aim, says the author, is "to develop as complete a presentation of the existing state of electrical theory" as a student of average attainments can be expected to assimilate. What will at once strike such a student is—how very large a thing this same electrical theory is ! Electricity may be styled indeed an anima mundi, only that it is not a vague philosophical conception, but a force which is accurately measured. All this, with its far-reaching applications—let a reader note, as an example, the astronomical illustrations, such as the account of Nova Persei in chaps. 19-20—is surprising enough; but it is in his final chapter that Mr. de Tunzel- mann, dealing with the most important of all questions, " The Place of Mind in the Universe," takes us furthest. It is dis- tinctly satisfactory to sea that our author may be said to be "on the side of the angels."
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