SCIENCE, August 31, 1883. No. 30.

Cambridge: The Science Company, 1883. Articles: Notes on the Geology of the Troad, by J.S. Diller; Occurrence of Mound-Builders Pipes in New Jersey, by Charles C. Abbott with an illustration; The Igloo of the Innuit. -III. with 9 illustrations; Minnesota Weather; Transactions of the American Society of Mechanical Engineers; Geology of Philadelphia by Henry Carvill Lewis; The Iroquois Book of Rites; The Evidence for evolution in the history of the extinct Mammalia with a table; A classification of the natural sciences by T. Sterry Hunt with a table; Orbit of the great comet of 1882 by Edgar Frisbie; The tornado at Racine, May 18, 1883 ; A Method for the calibration of a galvanometer with an illustration; The utilization of the sun's rays for warming and ventilating apartments by E. S. Morse; New form of selenium cell, with some remarkable electrical discoveries made by its use; 3 articles by B. F. Thomas: A Method of determining the centre of gravity of a mass with an illustration; Two forms of apparatus for Boyle's law with 2 illustrations; and A new heliostat with an illustration; The static telephone by Prof. A. E. Dolbear; Report of the committee on indexing the literature of chemical elements; The kinetic theory of the specific heat of solids and A kinetic theory of melting boiling by H. T. Eddy; On y-dichlordibrompropionic and y-dichlorbromacrylic acids by C.F. Mabery; The sub-aqueous dissociation of certain salts with a graph; Suggestions for computing the speed of chemical reactions; Twelve months of lysimeter record at the New York agricultural experiment station by E.L. Sturtevant; The composition of American wheat and corn with a table; The sotol, A Mexican forage plant; American butters and their adulterations by H. W. Wiley; A Comparison of terr-cotta lumber with other materials; Improvements in shaping-machines; Regularity of flow in double-cylinder rotary pumps; The early History of the North American Continent; and The Remington Type-Writer by Richard A. Proctor with an illustration. pp. 255-298. Covers are advertisements for Photo-Engraving, Park Place, N.Y. and Electrical Test Instruments.. Additional page front and back with advertisements, before articles. ex.-mus. stamp and numbers on front cover. Some small chips on side and bottom edges.Spine split up 6" but covers still intact. overall exterior is Good.. Interior is tight, clean and VG+. Around borders some age-toning, not on text.. Wraps. Good. Illus. by Etchings, Tables, Graph. Size: Approx. 7 1/2" x 10 1/4". Science.