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essay presents the substance of a course of lectures delivered by the author in the University of Cambridge. The doctrine of the dissipation of energy is, that "there is a universal tendency in nature for energy to take such forms and to be so distributed that it is not available to do mechanical work." This theory is here considered in a form especially adapted to the problems of chemistry, and will prove of interest to students of chemical philosophy.

essay read before the American Climatological Association, and reprinted from "The New York Medical Journal" for September, 1884. The author takes the position that "an actually small amount of atmospheric moisture is the most important element in the best climates for phthisis." The causes affecting dryness, i. e., temperature, altitude, the seasons, etc., are considered; tables of Signal-Service stations in the United States, rated in order of dryness, are given; and, finally, the physical effects of dryness are discussed.

Pennsylvania Boroughs. By William P. Holcombe. Baltimore: N. Murray. Pp. 51. 50 cents.

Bulletin of the Philosophical Society of Washington. Vol. VIII, 1885. Washington: Smithsonian Institution. Pp. 110. 75 cents.

Forests and Fruit-Growers. By Abbot Kinney, Los Angeles, California. Pp. 5.

Eczema. By George H. Rohe, M. D. Baltimore: Thomas & Evans. Pp. 46.

Bulletin of the Scientific Laboratories of Denison University. Edited by C. L. Herrick, Granville, Ohio. Pp. 136, with Tables and Plates.

American Society of Microscopists. Eighth Annual Meeting, August. 1885; Proceedings. D. S. Kellicot, Secretary. Buffalo, N. Y. Pp. 253, with Plates.

Reflex Irritation from Hypertrophy of Labia Minora. By Charles L. Gwyn, M. D., Galveston, Texas. Pp. 7.

Gyrating Bodies. An Empirical Study. By C. B. Warring. Ph. D., Poughkeepsie, N. Y. Pp. 106, with Plates.

The Physics and Metaphysics of Money. By Rodmond Gibbons. New York: G. P. Putnam's Sons. Pp. 34. 25 cents.

On the Nutritive Value of some Beef Extracts. By Thomas J. Mays, M. D. Philadelphia. Pp. 12.

The Influence of Sewerage and Water-Supply on the Death-Kate in Cities. By Erwin F. Smith, Ann Arbor, Mich. Pp. 84, with Plates.

International Electrical Exhibition, 1884; Reports on Educational Apparatus and Apparatus for High Electro-Motive Force. Pp. 56. Meteorological and other Registers. Pp. 13. Philadelphia.

Ottawa Field Naturalists' Club. Transactions, No. 6. 1884, 1835. F. R. Latchford, Ottawa, Canada. Pp. 140, with Plates.

Montreal Botanic Garden. First Annual Report. D. P. Penhallow, Director. Pp. 31.

The Processes of Electrotyping and Stereotyping. Boston: H. C. Whitcomb & Co. Pp. 24.

Report of the Agricultural Experiment Station at Amherst, Mass., for 1885. O. B. Had wen, Secretary. Pp. 141.

The Sphingidæ of New England. By C. H. Fernald, Orono, Me. Pp. 87, with Plates.

Food Consumption, etc. By Carroll D. Wright. With Chemical Analysis and Treatment by Professor W. O. Atwater, Middletown, Conn. Pp. 70.

The Economic Fact-Book and Free-Traders' Guide. Edited by R. R. Bowker. New York Free Trade Club, 39 Nassau Street. Pp. 151. 25 cents.

Passaic, New Jersey, and its Advantages as a Place of Residence and as a Manufacturing Center. By William H. Gillen. Pp. 48.

List of the Aphididæ of Minnesota. By O. W. Oestlund, University of Minnesota. Pp. 50.

Double Congenital Displacement of the Hip. By Buckminster Brown, M.D. Boston: Cupples, Uphain & Co. Pp. 24, with Plates.

Notes giving a Cause for the Present Dull Times. By Frederic Grimm, San Francisco. Pp. 96.

Quarterly Report of the Bureau of Statistics, Treasury Department, to December 31, 1885. Washington: Government Printing-Office. Pp. 100.

The Topographic Features of Lake Shores. By Grove K. Gilbert. Washington: Government Printing-Office. Pp. 121, with Plates.

The Monthly Index. Q. P. Index, Bangor, Me. Monthly, folio page. 25 cents a year.

Taxation of Mutual Life Insurance. By Jacob L. Greene. Pp. 10.

The Half-Breed—Vita sine Literis. By John Reade. Montreal: Dawson Brothers. Pp. 33.

The Social Emancipation of the Gipsies. By James Simson. New York: Thomas R. Knox & Co. Pp. 30. 25 cents.

Electric Lighting: Its Present Condition. By N. H. Schilling, Ph. D. Boston: Cupples, Upham & Co. Pp. 55.

Scouring of Wool in Belgium, Great Britain, and Germany. Consular Reports. Washington: Government Printing-Office Pp. 8, with Plates.

Dutch Village Communities on the Hudson River. By Irving Elting. Baltimore: N. Murray. Pp. 68. 50 cents.

Town Government in Rhode Island. By William E. Foster. The Narragansett Planters. By Edward Channing. Baltimore: N. Murray. Pp. 36 and 23. 50 cents.

Fish Remains and Tracks in the Triassic Rocks at Weehawken, New Jersey. By L. P. Gratacap. Pp. 4.

Destruction of our Native Birds. Committee Report, American Ornithologists' Union. Pp. 16.

Les Crânes dits deformes. (Skulls called deformed.) By Juan Ignacio de Armas, Havana. Pp. 16.

On the Inequalities of Wealth. By an American. New York: Theo. Berendsohn. Pp. 15. 10 cents.

What is Medicine? By Albert L. Gihon, M. D. Pp. 28.

Discussion of a Paper on the South Pass Jetties. By James B. Eads. Pp. 48.