Preparation of Ozone. 119 
4, The water of the Seine taken at Paris, is one of those containing the 
least fluorine. 
5. Of the rivers of France, one of the richest in fluorine is that of the 
La Somme near Amiens. 
6. Mineral waters vary in amount of fluorine; the richest examined 
are, the waters of Contrexeville, Antogast, Rippoldsau, Geilnan and 
Chatenois (Bas-Rhin). Reactions may be obtained from a litre of these 
wa 
ers. 
_ 1. The Atlantic affords no sensible amount even from 300 litres, show- 
oxydizes the phosphorous acid, but, as Baumert has shown, it increases the 
on Babo has succeeded in drying ozone so far as to render it anhy- 
drous, whence it follows that ozone, or at least this kind of ozone, cannot 
be confounded with the hydrogenated ozone HO® discovered by Baumert. » 
Dunsen an nus, who made remarks on this paper, expressed the 
pinion that we must admit two kinds of ozone, one allotropic oxygen 
and the other a hydrogenated compound. 
Sc Onbein on Ozone.— page 19 of this volume. o 
Notices by Prof. Hrdmann, of Leipzig —The name of Erdmann is in 
high regard among chemists, as well from his fine researches, as from 
his eng the early teacher of the lamented Gerhardt.* Erdmann had 
the insight to detect the future greatness of this distinguished chemist 
and to open the treasures of his science to his pupil—so early deceased— 
* See our biog. notice of Gerhardt, this Jour. Jan., 1857, p. 102. 
