228 



ANALYSES OF MINERALS. 



- fifteen feet. The clouds flew with extreme rapidity, and twice 

 I saw flashes of light from them. I raised my electrometer, 

 armed with its conductor two feet long, but the balls still con- 

 tinued in contact. 



If these researches afford nothing more than conjecture, they 

 will have at least the advantage of serving as a guide to more 

 enlightened observers, whose labours may extend our know- 

 ledge of a very obscure subject, to elucidate which is difficult. 



Magncsite. 



Magnesian 

 limestone. 



Wavellite from 

 Barnstable, 



and South 

 America, 



XIII. 



Analyses of Minerals. By Martin Henry Klaproth, 

 Ph. D. &c. 



{Concluded from vol. XXXIl^p. 384.) 



AGNESITE from Styria*. 



Magnesia 48 



Carbonic acid.. '•..., AQ 



Water 3 



JOO 



Gurolian (so named by Karsten from the place where found). 



Carbonated lime 70 5 



magnesia 29*5 



100 

 Wavellite from Barnstable, in Devonshire. 



Alumlne yi-5 



Oxide of iron 0*5 



Water ,. 28 



100 



Wavellite brought from Hualgayoc in South America, by 

 Humboldt. 



Alumine 68 



Silex 4'5 



Oxided iron 1 



Water 26*5 



100 



* For a paper on thi<; stone by Messrs, Haberle and Bucholz, see 

 Journal, vol, XXXI, p. 269. 



SUkeo* 



