292 Intelligence and Miscellaneous Articles. 



closing the current. The following are the principal results which 

 he obtains : — 



1. The internal resistance of the elements used (cylindrical glass 

 vessels 2 cm. in diameter, distance between the electrodes 3-4 cm.) 

 varied at ordinary temperatures between 40 and 80 ohms accord- 

 ing to the distance and magnitude of the electrodes. 



2. The resistance varied considerably with the temperature, being 

 trebled when it fell from 30° to 5°. 



3. No diminution of the internal resistance with the strength 

 and duration of the current could be ascertained. 



4. With stronger currents of 0*005 ampere (external resistance 

 200 ohms) polarization could be perceived even after 0*01 of a 

 second. It increased but little during the first ten minutes, but 

 afterwards more and more rapidly. 



5. On opening the circuit the polarization diminished in a few 

 minutes to a small fraction. Repeated short-circuiting through 

 only 50 ohms' external resistance for more than a minute did not 

 permanently injure the element. 



6. When an element was closed for 2 hours through 200 ohms, 

 by which its electromagnetic force was reduced almost to one half, 

 in 2 minutes it attained its original strength to within 0-1 p.c. 

 But after this the polarization set in more rapidly and strongly. — 

 Wiener Berichte, July 1897. 



SPECIFIC HEAT OF DIFFICULTLY FUSIBLE METALS. 

 BY H. MACHE. 



Since the introduction of Moissan's method of reducing difficultly 

 fusible metals by means of the electrical furnace it is possible to 

 obtain these in a compact solid form, while previously they could 

 only be had in powder. By this it is possible to obtain the specific 

 heats with greater accuracy. By the aid of Bunsen's ice-calori- 

 meter, palladium, chromium, vanadium, and tungsten were deter- 

 mined and the specific heats obtained: Pd = 00549, Cr=0 - 1208, 

 V=0-1153, Wo=0-0336.— Wiener Berichte, July 1897. 



DETERMINATION OF THE COEFFICIENT OF MAGNETIZATION OF 

 LIQUIDS AND THEIR DEPENDENCE ON TEMPERATURE. BY 

 PROF. DR. GUSTAV JAGER AND DR. STEFAN MEYER. 



The method is that of measuring the ascent in narrow tubes in 

 the magnetic field which was produced by the large electromagnet 

 of the Physical Institute. By taking special precautions consider- 

 ably greater accuracy could be obtained than heretofore ; the 

 position of the meniscus was kept constant by increasing the 

 pressure of a large volume of air. Solutions of magnetic salts in 

 water were principally investigated. — Wiener Berichte, July 1897. 



