CONTENTS 
Page 
Chemistry. — Some Applications of the Variation of Hydrogen Overvoltage 
^ WITH THE Pressure By D. A. Maclnnes and W. A, Contieri 321 
2^L0GY.— The Effect of Transplanting Limbs upon the Formation of Nerve 
Plexuses and the Development of Peripheral Neurones 
By S. R. Detmler 324 
Physics. — ^The Interferometry of Rapid Vibrations Chiefly in Relation to 
Tei^phone Currents , By C. Barus 331 
Physics. — On The Pressure Variation of Specific Heat of Liquids . . . 
By C. Barus 340 
Anatomy.— Studies of Magnitudes in Star Clusters, IX. The Distances and 
Distribution of Seventy Open Clusters , . , , By Harlow Shapley 344 
Physics. — ^A Comparison of Certain Electrical Properties of Ordinary and 
Uranium Lead By P, W. Bridgman 351 
Extracts from Minutes of Meetings of the Executive Board, Joint Meeting 
OF THE Executive Board of tse National Research Council of the 
National Academy of Sciences 354 
