644 PROCEEDINGS OF THE AMERICAN ACADEMY. 



appears on the anode, on the side away from the electro-magnet, while 

 the fluorescent light is forced somewhat beyond the cathode. 



13. The use of Leyden jars in the case of low potential coils greatly 

 modifies the effect of the application of the magnetic field, while with 

 coils giving sparks of over 20 cm. with comparatively large Leyden jars 

 in circuit, the application of the magnetic field to either anode or cathode 

 results in greatly increased production of X-rays. 



14. The application of a strong magnetic field at the anode, with 

 lines of force along the line of electric discharge, forms a safe and useful 

 method of regulation of X-ray bulbs. 



15. The application of the magnetic field at a suitably placed anode 

 constitutes a magnetic rectifier for alternating currents. 



