POPULAR SCIENCE MONTHLY.
value to the contents of this volume." The few essays in Lange's volume that still remain untranslated, are characterized as being mostly of an ephemeral character. with the publication of the present volume, of which, as of the Pedagogics, Miss Josephine Jarvis is the translator, a complete list of the original works of Froebel in English translations has been provided in the International Education Series of Messrs. D. Appleton and Company.
A useful manual for students in chemistry is the Chemical Experiments of Prof. John F. Woodhull and M. B. Van Arsdale (Henry Holt & Co., New York). It embraces directions for making seventy-five experiments with different substances and chemical properties, including oxygen and the air, hydrogen and water, chlorine and the chlorine family, acids, bases, salts, sulphur, nitrogen, carbon, carbon dioxide and the carbonates, fermentation, potash, and problems to illustrate the law of definite proportions. A title is given to each experiment, suggesting what is to be proved by it; the details of the process are given, and the pupil is left to do the rest, entering his particular observations and conclusions on the blank page opposite the text. Questions are appended, of a nature further to develop the thinking powers of the pupils, and tables or lists are added of the elements concerned in the experiments, weights and measures, apparatus, and chemicals.
The book Defective Eyesight: the Principles of its Relief by Glasses, of Dr. D. B. St. John Roosa, is the result of an attempt to revise The Determination of the Necessity for Wearing Glasses, published by the same author in 1888. It was found, on undertaking the work of revision, that the advance in our knowledge of the proper prescription of glasses, especially in the matter of simplicity in method, had been so great as to require a complete rewriting. In doing this the book has been very much enlarged, and illustrations have been introduced. The author hopes his manual may prove a reliable guide to the student and practitioner in ophthalmology, and may also be of interest to persons who wish to know the principles on which the prescription of glasses is based. The special subjects treated of are the measurement of visual power, presbyopia, myopia or short-sightedness, hypermetropia, corneal astigmatism, asthenopia, and the qualities of lenses. (Published by the Macmillan Company. Price, $1.)
Agricultural Experiment Stations. Bulletins and Reports. North Carolina State Agricultural Society: Second Annual Report (1896) of the Experimental Farm at Southern Pines. Pp. 90.—Ohio: Press Bulletin No. 195. Stomach Worms In Sheep. Pp. 2: No. 190. Comparison of Varieties of Wheat. Pp. 2; No. 197. Successful Treatment of Stomach Worms in Sheep. Pp. 2; No. 198. Varieties of Wheat and Home-mixed Fertilizers. Pp. 2.—United States Department of Agriculture: Monthly List of Publications (July, 1899). Pp. 4; Report on North American Fauna. No. 14. Natural History of the Tres Marias Islands. Mexico. Pp. 96; No. 15. Revision of the Jumping Mice of the Genus Zaphus. By Edward A. Preble. Pp. 34, with one plate; Report of the Puerto Rico Section of the Weather and Crop Service of the Weather Bureau, for May, 1899. Pp. 8.
Baker, M. N. Potable Water and Methods of Detecting Impurities. New York: The Van Nostrand Company. (Van Nostrand Science Series.) Pp. 97. 50 cents.
Beman, W. W., and Smith, D. E. New Plane and Solid Geometry. Boston: Ginn & Co. Pp. 382.
Bulletins, Proceedings, Reports, etc. Boston Society of Natural History: Vol. XXIX. No. 2. Variation and Sexual Selection In Man. By E. T. Brewster. Pp. 16: No. 3. Notes on the Reptiles and Amphibians of Intervale, New Hampshire. By Glover M. Allen. Pp. 16; No. 4. Studies in Diptera Cyclorhapha. By G. & N. Hough. Pp. 8: No. 5. Contributions from the Gray Herbarium of Harvard University. New Series: No. 17. By B. L. Robinson and J. M. Greenman. Pp. 12.—Dominion of Canada: Parliamentary Standing Committee on Agriculture and Colonization. Improvements in Crop Growing. By Prof. James W. Robertson. Pp. 30.—International Correspondence Schools. Scranton, Pa.: General Circular. Pp. 32.—Liberal University, Silverton, Oregon: Announcements. Pp. 18.—Society of American Authors: Bulletin for July. 1899. Pp. 22.—University of Michigan, Department of Medicine and Surgery: Annual Announcement for 1899-1900. Pp. 91.—United States Artillery Journal: Index to Vol. X, 1898. Pp. 12.
Carpenter, George H. Insects, their Structure and Life. A Primer of Entomology. New York: The Macmillan Company. Pp. 401. $1.75.
Daniels, Winthrop Moore. The Elements of Public Finance, Including the Monetary System of the United States. New York: Henry Holt & Co. Pp. 383. $1.50.
Grotius. Hugo, Proceedings at the Laying of a Wreath on the Tomb of, July 4, 1899, by the Commission of the United