324 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



the molybdenite, B the corresponding curve when the current was sent 

 from the molybdenite to the copper. These curves resemble those 

 obtained in Part I with carborundum. The molybdenite rectifier is, 

 however, seen to operate with a much smaller resistance than the car- 



TABLE I. 

 Current-Voltage Values for the Molybdenite Rectifier. 



borundum rectifier. This makes the molybdenite rectifier applicable 

 to use with smaller voltages than the carborundum, consequently the 

 molybdenite rectifier is a more sensitive detector for electric waves or 

 for small alternating voltages than the carborundum rectifier. In fact, 

 the molybdenite rectifier, as a detector for electric waves, is, so far as 



