vi CONTENTS. 



Page 



XIT. Descriptions of New Plants, chiefly Gamopetake, collected in 



Mexico by C. G. Pringle in 1889 and 1890. By B. L. 

 Robinson « i64 



XIIT. Concerning the Life-History of Saccorhiza dermatodea. By 



William Albert Setchell 177 



XIV. On some simple Cases of Electric Flow in Flat Circular 



Plates. By B. O. Peirce 218 



XV. A Revision of the Atomic Weight of Copper. Fourth Paper. 



By Theodore William Richards 240 



XVI. The Action of Acetoacetic Ether on Quinones : Synthesis of 



Benzofurfuran Derivatives. By M. Ikuta 295 



XVII. Note on the Variation of Molecular Pressure. By Carl 



Barus 313 



Proceedings 327 



Memoirs: — 



Henry Jacob Bigelow 339 



Charles Otis Boutelle 351 



Alfred Hostiier . . 354 



George Bancroft 355 



Jaliu.s Erasmus Hilgard 370 



Christian Heinrich Friedi'ich Peters 373 



Charles John Maxiraowicz 374 



Karl Wilhelm von Naes^eli 370 



Eduard Schiinfeld 381 



List of the Fellows and Foheigv Honorary INIembers . . 384 

 Index 391 



