The Use of Isotopes as Indicators in Biological Research.

The Use of Isotopes as Indicators in Biological Bemal Organism: PROFESSOR E. K. MARSHALL, JR., search: DR. AUGUST KROGH .187 W. C. CUTTING and KENDALL EMERSON, JR. DifScientific Events: fraction of X-rays at Very Smnall Angles by CelluLetters and Manuscripts of T. H. Huxley; Reloses and Rayons: PROFESSOR G. L. CLARK and E. search on Metals; The Northwest Scientific AssoA. PARKER. Secondary Increase of Length of ciation; Grants in Aid of Research by the GeologStretched Chilled Rubber: W. HAROLD SMITH'and ical Society of America; Awards of the James F. DR. CHARLES PROFFER SAYLOR .201 Lincoln Arc Welding Foundation; Recent Deaths Scientific Apparatus and Laboratory Methods: and MLemorials .................. 191 Potential Measurements in Oxido-reduction MixScientific Notes andNews ............................................................. ........L tures: DR. D. B.KOROON. Mtseum Labels' PRODiscussion: FESSOR CLARENCE R. SMITH. The Flagella of Etymology and Pronunciation of the Word "OesPeranema: D. W. DUNHAM . 205 trus" and its Derivatives: PROFESSOR GEORGE W. Science News .........8............. 8 CORNER. Carbonation vs. Carbonatization: PROFESSOR W. A. TARR. Seedlessness in Tomatoes: SCIENCE: A Weekly Journal devoted to the AdvanceLESLIE R. HAWTHORN. A Case of Incorrect ment of Science, edited by J. MCKEEN CATTELL and pubIdentifiation: DR. M. W. DR LAUBENFELS. Ablished every Friday by normal Fever Cases: DR. ONA K. DEFOE ... . 197 THE SCIENCE PRESS Scientific Books: Miller's Comnplete Works: PROFESSOR W. A. MANNew York City: Grand Central Terminal NING ..... 199 Lancaster, Pa. Garrison, N. Y. Special Articles: Annual Subscription, $6.00 Single Copies, 15 Cts. The Isolation of a Homogeneotus Heavy Protein SCIENCE is the official organ of the American Associafrom Virus-induced Rabbit Papillomas: DR. J. W. tion for the Advancement of Science. Information regardBEARD and DR. RALPH W. G. WYCKOFF. Acetylaing membership in the Association may be secured from tionof Pra-Ainobneensulfnamie inthe nithe office of the permanent secretary, in the Smithsonian tion of Para-Amninobenzenesuslfonarnide th AninInstitution Building, Washington, D. C.