CONTENTS 

 Original Papers 



Page 

 Radiotelegraphy.— New method of using contact detectors in radio meas- 

 urements. L. W. Austin 569 



Ornithology. — Diagnosis of a new genus of Anatidae from South America. 

 Harry C. Oberholser 571 



I 



Abstracts 



Physics 573 



Magnetism 575 



Spectroscopy 575 



Mycology 576 



Engineering 5'< 6 



Chemistry 577 



Soil Physics 577 



Technology 578 



Scientific Notes and News ^ 579 



