ALL MATTER TENDS TO ROTATION, OR THE ORIGIN OF ENERGY. A New Hypothesis which throws Light upon all the Phenomena of Nature. Electricity, Magnetism, Gravitation, Light, Heat, and Chemical Action explained upon Mechanical Principles and traced to a Single Source. By Leonidas Le Cenci Hamilton, M. A. Vol. 1. Origin of Energy: Electrostatics and Magnetism. Containing 100 Illustrations, including Fine Steel Portraits of Faraday and Maxwell. Handsomely bound in cloth. 8vo, 340 pp. Price, $3.00. Net.

In this volume the author has utilized the modern conception of lines of force originated by Faraday, and afterwards developed mathematically by Prof. J. Clerk Maxwell, and he has reached an explanation of electrical and magnetic phenomena which has been expected by physicists on both continents. It may have a greater influence upon the scientific world than either Newton’s “Principia” or Darwin’s “Origin of Species,” because it places natural science upon its only true basis—Pure Mechanics.

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HOW TO WRITE THE HISTORY OF A FAMILY. By W. P. W. Phillimore, M. A., B. C. L. 1 vol. Cr. 8vo. Tastefully printed in antique style, handsomely bound. $2.00.

Unassuming, practical, essentially useful, Mr. Phillimore’s book should be in the hands of every one who aspires to search for his ancestors and to learn his family history.—Athenæum.

This is the best compendious genealogist’s guide that has yet been published, and Mr. Phillimore deserves the thanks and appreciation of all lovers of family history.—Reliquary.

Notice.—Large Paper Edition. A few copies, on hand-made paper, wide margins, bound in half morocco, may be obtained, price $6.50 net.

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THE KINSHIP OF MEN: An Argument from Pedigrees; or, Genealogy Viewed as a Science. By Henry Kendall. Cr. 8vo. Cloth, $2.00.

The old pedigree-hunting was a sign of pride and pretension; the modern is simply dictated by the desire to know whatever can be known. The one advanced itself by the methods of immoral advocacy; the other proceeds by those of scientific research.—Spectator (London).