CONTENTS 
ix 
Is There a Temperature Coefpiceent for the Duration of Life? 
By Jacques Loeh and J. H. Northrop 456 
The Mechanism of Diffusion of Electrolytes Through Animal Membranes 
By Jacques Loeh 511 
Salt Antagonism in Gelatine By W. O. Fenn 534 
Similarity in the Behavior of Protoplasm and Gelatin ByW.O. Fenn 539 
On the Hydrogen Ion Concentration of Sea Water, and the Physiological 
Effect of the Ions of Sea Water By J. F. McClendon 689 
Some Interrelations between Diet, Growth, and the Chemical Composition 
OF THE Body By Lafayette B. Mendel and Sarah E. Judson 692 
Further Studies of Nerve Conduction in Cassiopea, By Alfred Goldshorough Mayer 721 
ANTHROPOLOGY 
PAGE 
Brief Notes on Recent Anthropological Explorations Under the Auspices of 
the Smithsonian Institution and the U. S. National Museum 
By Ales Hrdlitka 32 
Zuffi Culture Sequences By A. L. Kroeber 42 
Archaelogical Explorations at Pecos, New Mexico By A. V. Kidder 119 
Man and Metals By Walter Hough 123 
The Failure and Revival of the Process of Pigmentation in the Human Skin 
ByA.E.Jenks 164 
The Genetic Relations of Certain Forms in American Aboriginal Art 
By Clark Wissler 224 
Terms of Relationship and Social Organization By Truman Michelson 297 
New Data on the Archaeology of Venezuela By Herbert J. Spinden 325 
The Pacific as a Field for Ethnological and Archaeological Investigation .... 
By J. Walter Fewkes 427 
New Evidence in Regard to the Instability of Human Types. . .By Franz Boas 713 
PSYCHOLOGY 
Personal Equaiion and Steadiness of Judgment in the Estimation of the Num- 
ber of Objects in Moderately Large Samples By J. Arthur Harris 65 
A New Method of Studying Ideational and Allied Forms of Behavior in Man 
and Other Animals By Robert M. Yerkes 631 
Ideational Behavior of Monkeys and Apes By Robert M. Yerkes 639 
Some Psycho- Physiological Processes as Affected by Alcohol. .By W. R. Miles 703 
