Intelligence and Miscellaneous Articles. 143 



the gas that interested me the most, I fouud at 0° 



v = 206-4 metre, 

 and fc= 1-327. 



Some months later Mr. Strocker found for chlorine with a method 

 quite different from my own, 



v = 205*3 metre, 

 £=1-323. 



With my best thanks, 



I am, 



Respectfully yours, 



Tito Martin r. 

 Venice, November 20, 189-1. 



INFLUENCE OF MAGNETIC FIELDS ON THE ELECTRICAL 

 CONDUCTIVITY OF BISMUTH. 



To the Editors of the Philosophical Magazine. 



Gentlemen, 



I regret that mention of the papers by Dr. Edm. van Aubel in 

 the Annates de Chimie et de Physique for 1889, and in the Journal 

 de Physique for 1893, was omitted from my paper "On the Influence 

 of Magnetic Fields on the Electrical Conductivity of Bismnth" in 

 your Magazine for November last. In his work on the Tem- 

 perature-Coefficient of Bismuth, van Aubel found that it was con- 

 siderably changed in a magnetic field ; and at the " Congres des 

 Electriciens " in Paris in 1889 he emphasized the necessity for 

 observing the temperature, in measuring magnetic fields by the 

 resistance of bismuth spirals. 



I remain, Gentlemen, 



Yours faithfully, 



James B. Henderson. 

 The Yorkshire College, Leeds. 



ON THE INFLUENCE OF TEMPERATURE ON THE SPECIFIC HEAT 

 OF ANILINE. BY E. H. GRIFFITHS, M.A. 



Note, Dec. 7, 1894. — In a communication made to the Royal 

 Society on November 22, Professor Schuster pointed out an error 

 in my determination of the value of J, viz. that I had not made a 

 necessary correction for the specific heat of the air displaced by 

 the water ; for the method I had adopted gave the difference in 

 the rate of rise when a certain space was filled first with air and 

 then with water. This correction raises my value of J by about 

 1 in 4000. 



Now the specific gravity of aniline (T02) but slightly exceeds that 



