Rapid carbon dioxide test for sickling.

Enzymic Conversion of Maltose into Unfermentable Carbohydrate: S. C. Pan, A. A. Andreasen, and Paul Kolachov.115 Activation of Arginase in Vitro by Mouse Carcass Extract and the Cobalt Ion: 0. B. Wiswell .117 Further Study of the Role of Hyaluronidase in the Fertilization of Rabbit Ova in Vivo: M. C. Chang ...... ........................... 118 A Simple Staining Technique for Detecting Virus Diseases in Some Woody Plants: R. C. Lindner, H. C. Kirkpatrick, and T. E. W eeks ................................. 119 Biological Experiments on Drosophila melanogaster with Supersonic Vibrations: Hedi Fritz-Niggli and Albert Bni ........................ 120 A Simplified Method of Lyophilizing Microorganisms: R. W. Barratt and E. L. Tatum .12....................................... 2