sure. ,vc.) and making a scries of coi 1 1 j uirat i ve determinations. Sort-t 

 obtaintMl tli'- t'i .l!n\\ in-- result : two volumes >t' ozone capable of beiim 

 dissolved, when df>iroved (1\- heating a wire to a rcl heat by a 

 galvanic current) increase by one volume. Hence it is evident thai in 

 the formation "t ozone three volumes of oxvu'en u'ive two volumes of 

 ozone tliai is. it- density (referred to hydrogen ) = _ I . 



The observations and determinations of Soret sho\\-ed that ozone is 

 hea\'ier than oxygen, and e\'en than carbonic anhydride (because 

 o/.oni>ed oxyu'cn parses from tine orifices more slowly than oxygen 

 and than its mixtures with carbonic anhydride), although lighter than 

 chlorine (it flows more rapidly from such orifices than chlorine), and 

 they al>o indicated that n\nn>' /x on* and " hftff tini'-* d'liy-i' th<in 

 <>.'->j'/' a . which mav be expressed bv designating a molecule of oxygen 

 by ( )., and of ozone bv ( ^ \ and which likens ozone to compound sub- 

 stances' 1 formed by oxygen, as. for instance. CO.,, SO,. ()()._,. XO.,, iVc. 

 This explain- the chief dillerence> between ozone and oxygen, and the 

 cause of the i>oineri-m. and at the same time leads one to expect " 

 'hat ozone, as a uas \\'hich is denser than ox\ - u'<'ii, would be liquefied 



