160 Intelligence and Miscellaneous Articles. 



These measurements establish the result predicted. Between 

 the first experiment and the second the light traversed 0*80 metre 



in a time equal to 300> 00 8 ° 0o0 or about ^u^ooo o£ a second ' and the 

 phenomenon diminished from 17°-3 to 8°-7, that is to say by one 

 half. After 300 q 000 of a secoud the phenomenon was no longer 

 appreciable. 



MM. Abraham and Lemoine also exhibited to the Society an 

 arrangement which enables the birefringence of conductors to be 

 shown. The water which fills the tank of Kerr's condenser is 

 operated on. The condenser is placed between two crossed nicols 

 suitably situated. The spark E is always the source of light 

 employed. 



The manner of charging the condenser is different. The poles 

 of the transformer charg3 two condensers by cascade ; the exterior 

 armatures of these condensers are connected by a resistance of which 

 the condenser K forms part. During the charge the water plays 

 the part of a conductor. At the moment w 7 hen the spark passes, 

 the charges suddenly set free on the auxiliary condensers proceed 

 to charge the condenser K, and during this sudden action the water 

 acts as an insulator. The Kerr's condenser keeps its charge 

 for a very short time, and a brilliant reappearance of light is 

 observed. — Seances cle la Societe Francaise de Physique, Nov. 17, 

 1899. 



OBITUARY NOTICE : DR. J. L. HOWARD. 

 To the Editors of the Philosophical Magazine. 

 Gextlemex, 



Will you aliow 7 me to make use of your pages to annouuce the 

 death of Dr. J. L. Howard, at the age of 33, after an exceptionally 

 strenuous life. 



His initials were frequently appended to translations and 

 reviews in your columns. He published a joint paper with me 

 (July 1889) on the Eefraction of Hertz Waves by Pitch Lenses. 

 He was first a student and then a Demonstrator for 12 years 

 at University College, Liverpool ; and between the two stages 

 he had studied under Professor Quincke at Heidelberg, and 

 contributed a paper in conjunction with Dr. Lenard to Wiedemann's 

 Annalen on the Change of Resistance of Bismuth in a Magnetic 

 Field. 



As an industrious and learned physicist his early death is 

 deeply to be deplored, 



I am, Gentlemen, 



Tour obedient servant, 



Oliter J. Lodge. 



