A New Method for Isolation and Purification of Mammalian Striated Myofibrils.

Inactivation of Enzymes by Visible Light in the Presence of Riboflavin: Arthur W. Galston and Rosamond S. Baker 485 A New Method for Isolation and Purification of Mammalian Striated Myofibrils: Armin F. Schick and George M. Hass ............ 486 Paleocene and Eocene Strata in the Bearpaw Mountains, Montana: Roland W. Brown and William T. Pecora ...... 487 Sex Differences in Blood Pressure of Dogs: Edward J. Van Liere, J. Clifford Stickney, and Davi F. Marsh ................. ...................... 489 A Metabolism Cage for Small Animals: B. K. Harned, Raymond W. Cunningham, and Edna R. Gill ............. .......................... 489 Penicillin in Relation to Acid Production in Milk by Starter Cultures Used in Cheddar Cheesemaking: H. Katznelson and E.G.Hood .............................. 490 A Convenient and Rapid Method of Calibrating Warburg Manometers: W. F. Loomis ......... .............................. 491 Effect of Radioactive Phosphorus (P32) in the Culture Medium on Growth and Viability of Phomopsis citri and Diplodia natalensis: Erston V. Miller and Jerome J. Wolken ...... 492 Progesterone in Blood Plasma of Cocks and Nonovulating Hens: Richard M. Fraps, Charles W. Hooker and Thomas R. Forbes 493