CONTENTS. VU 



Page 



XXI. Contributions to American Botany. By Sereno Watson . 396 



XXII. On the Behavior of Sound and Decayed Wood at High 

 Temperatures. By Henry B. Hill and Arthur M. 



COMEY 482 



XXIII. The Efficiency of Small Electro-motors. By H. E. H. 



Clifford 493 



Proceedings 499 



Memoirs: — 



Charles Francis Adams 517 



Nathaniel Ellis Atwood 522 



Ephraim Whitman Gurney 523 



William Ripley Nichols 528 



Charles Callahan Perkins 534 



Henry Hobson Richardson 539 



Leopold von Ranks 542 



List of the Fellows and Foreign Honorary Members . . 559 



Index 567 



