462 Scientific Intelligence. 



merits of the electrical waves, influenced the emanation of the 

 X-rays. The rays from such a X-ray tube proceeding through an 

 aluminium window struck an electrode contained in a Faraday 

 cylinder ; this electrode was connected with an electrometer. 

 Changes in wave length were produced by moving a bridge on 

 the two wires of the Lecher system. The X-ray tube was 

 moved to and fro until maximum effects of ionization were pro- 

 duced in the receiving tube. These efforts produced correspond- 

 ing deflections of the electrometer. The relation of the doubled 

 displacement of the bridge in the Lecher system to the displace- 

 ment of the X-ray tube gave the ratio of the velocity of light 

 to the velocity of the X-rays. The ratios differ only one-half 

 per cent from the value of light. — Ann. der Physik, No. 9, 1906, 

 pp. 611-122. j. t. 



9. Formation of Ozone from Oxygen and Atmospheric Air 

 by Silent Discharges of Electricity. — E. Warburg and G. Leit- 

 hauser state that silent discharges between small spheres are 

 necessary for the formation of ozone from atmospheric air. A 

 number of tables are given of the output, in the case of spheres, 

 charged in one case positively and in another case negatively. 

 The results are plotted and appear in the form of straight lines. — 

 Ann. der Physik, No. 9, 1906, pp. 734-742. j. t. 



10. Oxidization of Nitrogen by Silent Discharges in Atmo- 

 spheric Air. — E. Warburg and G. Leithauser show that : 



(1) Nitrose gases in the presence of ozone are easily absorbed 

 by dilute soda lye. 



(2) With silent brush discharges from the positive terminal 

 sphere in atmospheric air, at the room temperature, independ- 

 ently of the moisture of the air, 10 liters of NO is oxidized by 

 an ampere hour. 



(3) The oxidized quantity of nitrogen mixture increases with 

 increasing temperature and then decreases with the formation of 

 the ozone. 



(4) A quantity of N 2 4 , indicating l cc NO in 1500 cc lessens 

 the formation of ozone when the silent discharge occurs in 

 atmospheric air. — Ann. der Physik, No. 9, 1906, pp. 743-750. 



J. T. 



11. Influence of Moisture and Temperature on the Ozonizing 

 of Oxygen and of Atmospheric Air. — E. Warburg and G. 

 Leithauser show that with a silent discharge, moisture effects 

 the ozonization more in the case of air than with oxygen, and 

 that a rise of temperature to 80° and constant pressure, pro- 

 duces* little effect in the case of both oxygen and atmospheric 

 air. — Ann. der Physik, No. 9, 1906, pp. 751-758. j. t. 



