Table of Contents

• Alexander Kolin

ISOELECTRIC SPECTRA AND MOBILITY SPECTRA: A NEW APPROACH TO ELECTROPHORETIC SEPARATION

• D. W. Woolley

A FURTHER STUDY OF THE APPARENT SYNTHESIS OF VITAMIN B 12 BY MAMMARY CANCERS OF MICE

• Henry Eyring
• and Taikyue Ree

A GENERALIZED THEORY OF PLASTICITY INVOLVING THE VIRIAL THEOREM

• Walter J. Schubert
• and F. F. Nord

INVESTIGATIONS ON LIGNIN AND LIGNIFICATION. XV. HETEROGENEITY OF NATIVE AND ENZYMATICALLY LIBERATED LIGNINS AS ESTABLISHED BY ELECTROPHORESIS AND PAPER CHROMATOGRAPHY

• Harold C. Urey

THE COSMIC ABUNDANCES OF POTASSIUM, URANIUM, AND THORIUM AND THE HEAT BALANCES OF THE EARTH, THE MOON, AND MARS

• Motoo Kimura

SOLUTION OF A PROCESS OF RANDOM GENETIC DRIFT WITH A CONTINUOUS MODEL

• Karl Sax
• and Edward D. King

AN X-RAY ANALYSIS OF CHROMOSOME DUPLICATION

• Dale Steffensen

BREAKAGE OF CHROMOSOMES IN Tradescantia WITH A CALCIUM DEFICIENCY

• G. E. Hutchinson,
• R. J. Benoit,
• W. B. Cotter,
• and P. J. Wangersky

ON THE NICKEL, COBALT, AND COPPER CONTENTS OF DEEP-SEA SEDIMENTS

• Alfred Brauer

BOUNDS FOR THE RATIOS OF THE CO-ORDINATES OF THE CHARACTERISTIC VECTORS OF A MATRIX

• R. L. Ingraham

AN EXTENSION OF THE MAXWELL THEORY

• Richard V. Kadison

MULTIPLICITY THEORY FOR OPERATOR ALGEBRAS

• Serge Lang

ABELIAN VARIETIES OVER FINITE FIELDS

• H. E. Rauch

ON MODULI IN CONFORMAL MAPPING

• John R. Platt

POSSIBLE SEPARATION OF INTERTWINED NUCLEIC ACID CHAINS BY TRANSFER-TWIST

HAMARTIEXÉRESIS AS APPLIED TO TABLES INVOLVING LOGARITHMS