Chemistry. 371 



Protoxide of azote gas, — 0.8542 Acetic acid, . - — 0.0364 



Protoxide of chlorine or euch- Point of true neutrality, - 0.0000 



lorine, - - —0.8541 Water, - - +0.2169 



Chlorine, - - —0.8207 Ammonia, - +1.1209 



Carbonic acid, - —0.8148 defiant gas, - +1.1478 



Phosgene gas, or chloroxi- Carburetted Hydrogen, - + 2.2515 



carbonic acid, - —0.7889 Hydrogen, - - +10.0222 

 Mem, dell. Realc Acad. Torino, torn, xxviii. p. 7i. 



20. Analysis of the Sulphur et of Manganese from Transylvania, by 

 Arfvedson. 



Manganese, ... 62.60 



Sulphur, - . - 37.00 



The formula ]\In S-, giving one atom of manganese, and two of sulphur, 

 makes this proportion = 63.88 : 3G. 12. (Poggendorff's Ann. der Phys. 

 1821.5.) 



21. Analysis of Blendey crystallized, yellow, and transparent, by Arfved- 

 son. 



Zinc, .... 66.34 



Sulphur, ... 33.66 



It contained, besides, a trace of iron. The formula Zn S 2 , expressing one 

 atom of zinc, and two of sulphur, agrees with the proportion 66.34 : 33-09. 



22. Analysis of Capillary Pyrites, by Arfvedson, 



Nickel, .... 64.35 



Sulphur, - - - 34.26 



It appeared to contain traces of cobalt and arsenic. The proportion be- 

 tween one atom of nickel and two atoms of sulphur is 64.35 : 35.02. The 

 sulphuret of nickel is not magnetic. 



23. Analysis of two varieties of Harmotome, by Dr Wernekingk of 

 Giessen. 



From Annerode. From SchifFenberg. 



Silica, 



Alumina, 



Lime, 



Baryta, 



Oxide of iron and manganese, 



Water, ' % - 



Both kinds occur in the cavities of basaltic hills, near Giessen, in Hes- 

 sia, at a distance of about three miles from each other. (Gilbert's Ann. 

 derPhysik. 1824, 2. p. 171.) 



21. Analysis of Sideroschisolite, by Dr Wernekingk. 



Silica, - - - 16.3 



Black oxide of iron, - - 75.5 



Alumina, - - - 4.1 



Water, - - - 7-3 



103.2 



