CONTENTS 
Page 
Physics— The Laws of Elastico-Viscous Flow By A. A. Michelson 319 
Physics.— A New Equation of Continuity ....... 5y Frederick G. Keyes 323 
Botany.— The Classification of Vascular Plants , , . By Edward W. Berry 330 
Physics. — ^Displacement Interferometry in Connection with U-Tubes . . , 
ByC.Barus 334 
Chemistry. — ^Attempt to Separate the Isotopic Forms of Lead by Fractional 
Crystallization By Theo^pre W. Richards and Norris F. Hall 339 
Genetics.— Hybrids of Zea Tunic ata and Zea Ramos a , . . By G. N. Collins 345 
Zoology.— Distribution of Gall MrocES By E. P. Felt 349 
Physiology. — ^Fertility and Age in the Domestic Fowl . . By Raymond Pearl 354 
Chemistry. — ^A Kinetic Hypothesis to Explain the Function 02 Electrons in 
THE Chemical Combination of Atoms By William A. Noyes 356 
Physics.— Transverse Displacement Interferometry . , . , By Carl Barus 360 
Agriculture.— The Proteins of the Peanut, Arachis Hypogaea 
By Carl 0. Johns and D. Breese Jones 365 
Anthropology.— A Design-Sequence FROM New Mexico . . By A. R. Kidder 369 
Chemistry. — ^The Equilibrium Between Carbon Monoxide, Carbon Dioxide, 
Sulfur Dioxide, and Free Sulfur By John B. Ferguson 371 
Agriculture. — Physiological Effect on Growth and Reproduction of Rations 
Balanced from Restricted Sources * 
By E. B, Hart, E. V. McCollum, H. Steenbock, and G. C. Humphrey 374 
Physiology. — ^What Determines the Duration of Life in Metazoa? . . , , 
By Jacques Loeb and J. H. Northrop 382 
Physiology.' — ^The Interrelation Between Diet and Body Condition and the 
Energy Production During Mechanical Work in the Dog 
By R. J. Anderson and Graham Lusk 386 
Report or the Annual Meeting 390 
