CONTENTS. 
J. F. McClendon : How could increase in permeability to electrolytes allow 
the development of the egg? i (526). 
A. Goldfarb : An inquiry into the nature of the changes in non-regener- 
ating animals. 2 (527). 
Sutherland Simpson and Andrew Hunter : Does the pituitary body 
compensate for thyroid insufficiency ? 3 (528). 
Sutherland Simpson and H. W. Hayes : The cardio-inhibitory nerve 
fibres in the woodchuck (Marmotta monax). 4 (529). 
Sutherland Simpson : On the relation between bile-secretion and bile 
pressure. 5 (530). 
Jacquez Loeb : The influence of the concentration of hydroxyl ions on the 
antagonistic effect of salts with bivalent metals. 6 (531). 
Donald D. Van Slyke and George F. White : Proteolysis in the stomach 
and intestine of the dogfish. 7 (532). 
Donald D. Van Slyke and George F. White : Absorption and secretion 
of alimentary nitrogen. 8 (533). 
Hugh A. Stewart : The cause of cardiac co-hypertrophy. 9 (534). 
Don R. Joseph and S. J. Meltzer : The origin of convulsions and paralysis 
following the intravenous injection of hypertonic solution of sodium 
chloride. 10 (535) 
Don R. Joseph and S. J. Meltzer : Simultaneous graphic registration of 
gastric and duodenal peristalsis in rabbits. 1 1 (536). 
Thomas H. Morgan : The method of inheritance of two sexlimited charac- 
ters of the same animal. 12 (537). 
J. J. R. MacLeod and R. G. Pearce : The glycogenolytic strength of 
blood serum from the pancreatico duodenal vein and from the femoral 
artery, and of lymph from the thoracic duct, as affected by stimulation 
of the great splanchnic nerve. 1 3 (538). 
Ellen P. Corson White and Leo Loeb. The influence of an inoculation 
with tumor material of experimentally decreased virulence upon the 
result of a second inoculation with tumor material of experimentally de- 
creased virulence. 14 (539). 
J. P. Atkinson and C. B. Fitzpatrick : Supplementary report on attempts 
to immunize against tuberculosis. 1 5 (540). 
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