312 Intelligence and Miscellaneous Articles. 



ascertain the precise composition of the ozonized mixtures to which 

 the measurements correspond. The progressive augmentation of the 

 attraction of the bar also permitted the decomposition of the ozone 

 to be traced. The various analyses which I have been able to make, 

 show only that the mixtures studied contained proportions of ozone 

 which varied between 0*02 and 0*10 by volume. The results ob- 

 tained are nevertheless sufficiently interesting, and may be, in the 

 mean, summed up as follows : — 



The small glass tube, when attracted in vacuo, was brought back 

 to its original position by a torsion of 14° 22' '. In oxygen at the 

 temperature of 10° and pressure of 760 millims. of mercury, for 

 the same magnetic intensity the torsion was not more than 3° 52', 

 which gives, for the effect produced upon oxygen alone, an attrac- 

 tion of 10° 30'. 



Under the same experimental conditions, on substituting -for 

 oxygen a mixture ozonized by passing very slowly through the 

 effluvia-apparatus at 10° temperature and atmospheric pressure, 

 the torsion was 2° 29' ; the attraction exercised upon the gaseous 

 mixture was therefore represented by 11° 53', or an increase of 

 0-13 above the specific magnetism of oxygen. 



By placiug the effluvia-apparatus in a refrigerating mixture of 

 ice and sea-salt a gaseous mixture richer in ozone is obtained. This 

 mixture, under the conditions of experiment which have just been 

 specified, manifested an increase of 0*23, or nearly J, above the 

 specific magnetism of oxygen. 



Ozone is therefore more magnetic than oxygen ; and, in spite of 

 the uncertainty which exists respecting the actual composition of 

 the ozonized mixtures investigated (an uncertainty which does not 

 permit the precise number for ozoue, supposing it isolated, to be 

 given at the present moment), it is easy to see that the ratio of the 

 specific magnetism of ozone to that of oxygen is notably greater than 

 the supposed ratio of their densities. The specific magnetism of 

 ozone is therefore greater than that which would correspond to the 

 amount of oxygen it contains. This phenomenon is interesting in 

 that it may be compared to those presented by certain magnetic 

 bodies, which in different states of condensation give magnetic 

 effects increasing much more rapidly than the ratio of the den- 

 sities. 



I am having an apparatus prepared, however, which I expect 

 will permit me to ascertain the exact quantity of ozone formed at 

 the moment of each experiment, and to give the true value of the 

 specific magnetism of this remarkable body. — Comptes Bendus de 

 VAcademie des Sciences, t. xcii. pp. 348-350 (Feb. 14, 1881). 



