816 



SCIENCE. 



[N. S. Vol. XV. No. 386. 



Edward W. Saunders, M.D., 1635 South Grand 

 Avenue, St. Louis, Mo. 



W. L. Savage, Director of Gymnasium, Columbia 

 University, New York City. 



John A. Shafer, Carnegie Museum, Pittsburg, 

 Pa. 



F. L. Shurly, M.D., 32 Adams Avenue, West, 

 Detroit, Mich. 



Clarence E. Skinner, M.D., 67 Grove Street, 

 New Haven, Conn. 



Harry A. Spangler, M.D., Carlisle, Pa. 



Lewis W. Steinbaoh, M.D., 1309 North Broad 

 Street, Philadelphia, Pa. 



Thos. C. Stellwagen, M.D., 1328 Chestnut Street, 

 Philadelphia, Pa. 



Cyrus L. Stevens, M.D., Athens, Pa. 



D. D. Stewart, M.D., 1429 Walnut Street, Phila- 

 delphia, Pa. 



B. Tauber, M.D., 213 West 9th Street, Cincin- 

 nati, Ohio. 



J. Erskine Taylor, M.D., Rockland, Pa. 



James L. Taylor, M.D., Wheelersburg, Ohio. 



Clement F. Theisen, M.D., 172 Washington Ave- 

 nue, Albany, N. Y. 



Edward A. Tracy, M.D., 353 Broadway, South 

 Boston, Mass. 



Wm. A. Tucker, New Eockford, North Dakota. 



Wm. Lyman Underwood, Mass. Inst. Tech., 

 Boston, Mass. 



Jules F. Valle, M.D., 3303 Washington Avenue, 

 St. Louis, Mo. 



J. Vanderlaan, M.D., 200 South Terrace Street, 

 Muskegon, Mich. 



Hermon L. Van Valkenburg, Amber Club, Pitts- 

 burg, Pa. Electrical Engineer. 



Solomon A. Vest, Assistant Chemist, Navassa 

 Guano Company, Wilmington, N. C. 



Karl von Ruck, M.D., Winyah Sanitarium, 

 Asheville, N. C. 



Jacob T. Wainwright, P. O. Box 774, Chicago, 

 111. 



John W. Wainwright, M.D., 177 West 83d 

 Street, New York, N. Y. 



T. B. Walker, 803 Hennepin Avenue, Minne- 

 apolis, Minn. President City Library Board. 



James J. Walsh, M.D., 1973 Seventh Avenue, 

 New York City. 



John C. Walton, M.D., Reidsville, N. C. 



Louis C. Ward, Bloomington, Indiana. 



Albert W. Warden, M.D., 32.5 Fulton Street, 

 Weehawken, N. J. 



Charles B. Warder, M.D., 1305 North Broad 

 Street, Philadelphia, Pa. 



John E. Weeks, M.D., 46 East 57th Street, New 

 York, N. Y. 



Marcus F. Wlieatland, M.D., 84 John Street, 

 Newport, R. I. 



Walter H. White, M.D., 220 Marlborough Street, 

 Boston, Mass. 



Burt G. Wilder, Professor of Neurology, etc., 

 Cornell University, Ithaca, N. Y. 



Theo. W. Wille, 2600 Girard Avenue, Phila- 

 delphia, Pa. 



Jacob L. Williams, M.D., 4 Walnut Street, 

 Boston, Mass. 



J. J. Wilmore, Director Mechanical Department, 

 Ala. Poly. Inst., Auburn, Ala. 



John A. Wyeth, M.D., 19 West 35th Street, New 

 York, N. Y. 



SGIEWTIFW BOOKS. . 

 Monographien aus der OeschicMe der Ghemie. 

 Herausgegeben von George W. A. Kahl- 

 BAUM. V. Heft. Justus von Liehig und 

 Christian Friedrich Schonhein. Briefwech- 

 sel 1863-1 8 6S. Herausgegeben von GEORaE 

 W. A. Kahlbaum und Ed. Thon. Leipzig, 

 Johann Anibrosius Barth. 1900. 12mo. 

 Pp. xxi+275. 



In the summer of 1853 Schonbein paid a 

 visit to Munich, and was introduced by von 

 Pettenkofer to Justus von Liebig. Schonbein 

 was at that time about fifty-four years of age 

 and had won distinction by his discoveries of 

 ozone, gun cotton and collodion; Liebig was 

 three years his junior and his reputation was 

 of the highest. The visitor from Switzerland 

 was received by the resident of Munich most 

 cordially, and to his great astonishment was in- 

 vited to lecture to the students, at one of the 

 regular hours used by Liebig, on his own 

 studies and discoveries. 



This friendly act was the beginning of an 

 intimacy that found expression in the letters 

 preserved in this volume. 



Ozone naturally occupies much space in the 

 letters written by Schonbein; in a letter dated 

 September 30, 1853, Liebig objected to the 

 name which was not adopted for a 'law of 

 nature'; he also condemned the term allo- 

 tropic. Several letters written in 1854 con- 

 cern SchiJnbein's paper, 'Chemical Action of 

 Electricity of Heat and of Light.' 



In their letters the friends write of discov- 

 eries made by themselves and by other chem- 



