CONTENTS 



Original Papers 



( Page 



Terrestrial Magnetism. — A consistent theory of the origin of the earth's 



magnetic field. L. A. Bauer 1 



Physics. — A micropyrometer. George K. Burgess 7 



Physics. — ^The constants of spectral radiation of a uniformly heated enclos- 

 ure or so-called black body. W. W. Coblentz 10 



Metallography. — An improved vertical-illuminator. Fred Eugene Wright . . 14 

 Botany. — Pseudannona, a new genus of Annonaceae from the Mascarene 

 Islands; together with notes on Art abotrys uncinatus and its synonomy. 

 W. E. Safford 16 



Abstracts 



Terrestrial Magnetism. .'. 20 



Physics 21 



Chemistry 23 



Botany 24 



Plant Physiology •. 25 



Phytopathology ♦ 26 



References 

 Physics 30 



Proceedings 

 The Anthropological Society of Washington 31 



