IV CONTENTS. 



The Treaty-making Power of the United States and the Methods 

 of its Enforcement as AfTecting the Pohce Powers of the 

 States. By Charlf-S H. Burr 271 



The Formation of Coal Beds. III. By John J. Stevexson. . 423 



An AutocolHmating Mounting for a Concave Grating. By 

 HoR.\CE Clark Richards 554 



The Objective Prism. By Edward C. Pickerinc; 564 



Notes on Plates of Nova Geminorum of 191 2 taken with the 

 Bruce Spectrograph of the Yerkes Observatory. By Storrs 

 B. Barrett , 568 



Relations Between the Spectra and Other Characteristics of the 

 Stars. By Henry Norris Russell 569 



Some Former Members of the American Philosophical Society. 

 By Thomas Willing Balch 580 



Minutes iii-.vi.v 



Obituary Notices of Members Deceased 



Jules Henri Poincare iii 



For Corrigenda see page 603. 



