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.) PUBLICATIONS RECEIVED. 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. 196. 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.