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420 David Starr Jordan and David Kop Goss; a review of the Sciænidæ, by Prof. Jordan and Carl H. Eigenmann; a paper on internal parasites of fishes, by Edwin Linton; and a report on Medusæ, by J. Walter Fewkes, all but the first of these being illustrated. A large number of reports from the vessels and stations of the Commission are printed, and the following papers from foreign sources are included in the volume: "On the Fish-cultural Establishments of Central Europe," by E. Bettoni and D. Vinciguerra; "Chemical Composition of Food Products," by P. Kostytscheff; "Cases of Poisoning caused by Spoiled Codfish," by Dr. E. Mauriac, and "Notes on the Norwegian Fisheries of 1885," by A. N. Kiaer. There is also a list of stations at which dredgings have been made in the Atlantic and Arctic Oceans from 1867 to 1887, by Sanderson Smith. The list is accompanied by five charts.

A translation of a series of essays by the Baroness Marenholtz-Buelow, setting forth Froebel's educational system, has been published under the title The Child and Child-Nature (Bardeen, $1.50). It describes the nature of the child, his needs, and the effects of training upon him. An account of Froebel's method is given, and this is followed by some of the exercises and translations of the songs which he devised for teaching the child's relations to nature, to mankind, and to God. A bibliography of Froebel is appended, and an index has been added to the American edition.

Dr. R. von Krafft-Ebing's Experimental Study in the Domain of Hypnotism has been translated into English by Charles G. Chaddock, M. D. (Putnam, $1.25). It is an account of a case which has excited much interest in Grätz, and comprises the preliminary history of the patient, a record of the course of her hystero-epileptic attacks, and a transcript from Prof. Krafft's daily notebook of hypnotic experiments upon her.

Evolution of the Electric Incandescent Lamp, by F. L. Pope (H. Cook, Elizabeth, N. J.), is a collection of extracts from records of courts and of the Patent-Office, newspaper files, and transactions of scientific societies bearing upon the question whether Edison or Sawyer and Man deserve the credit for the employing of a carbonized filament of organic material in the incandescent lamp. The book is illustrated with cuts of apparatus.

A beginner's text-book of Iron and Steel Manufacture has been prepared by Arthur H. Hiorns (Macmillan, $1), designed to give a knowledge of the principles underlying the processes of this industry. In the early chapters the substances used or produced in smelting are defined, the ores of iron are described, and the chemistry of the subject is explained. Then follow descriptions of the usual methods of extracting and refining the metal, and of the furnaces, hammers, and rolls employed in these operations. Iron casting, tinning, and galvanizing are also described. The processes in the production, tempering, and testing of steel are set forth in like manner. Questions are appended to each chapter for the use of students.

No. 96 of Van Nostrand's Science Series is on Alternate-Current Machinery, and comprises a paper read by Gisbert Kapp before the Institution of Civil Engineers, London, with the discussion upon it. Of the apparatus which may be properly included under his title, the author deals especially with alternators, transformers, and motors. The volume is illustrated with forty-three diagrams.

Since the first edition of the Manual of Assaying Gold, Silver, Copper, and Lead Ores, prepared by Walter Lee Brown (E. H. Sargent & Co., $2.50), was noticed in this magazine, the book has been increased from 318 to 487 pages. Other changes as given by the author are, "the stating of all charges in assay tons, grammes, and grains; detailed charges in the scorification process; full notes on the colors and appearances of the scorifiers (with a colored plate) and cupels after work; the expansion of the crucible process from nine to almost ninety pages; more complete articles on the assay of gold and silver bullion, and the volumetric analysis of copper ores; and, finally, the issuance of the book in flexible covers." The present (third) edition is but little changed from the second.

The little book by the late Walter Bagehot, embodying a Plan for Assimilating the English and American Money, first published in 1869, has been reissued in view of an expected revival of interest in the