M. Scheerer's Observations on Eltcolith and Nepheline. 105 



Lazulite. Artificial Ultramarine. 



Soda 9-09 Soda 21-476 



Lime 3-52 Potash .... 1-752 



Alumina .... 31 '76 Lime 0-021 



Silica 4-5-50 Alumina . . . 23-301< 



Sulphuric acid . 5-89 Silica 45-604 



Sulphur .... 0-95 Sulphuric acid 3-830 



Iron ...... 0-86 Sulphur . . . 1-688 



Chlorine .... 0-42 Iron 1-063 



Water 0-12 Chlorine ... a trace 



98-11 



TWO ANALYSES OF GMELINITE FROM GLENARM, SP. GR. 2'06 

 AT 12 C. BY M. CARL RAMMELSBERG. 



[From Poggendorff 's Annalen, B. xlix.J 



Oxygen. Oxygen. 



Silica .... 46-398 24-10 46-564- 24'19 



Alumina . . 21-085 9'84 20-186 9-43 



Lime .... 3-672 1-03 3-895 1-09 



Soda .... 7-295 1-86 7-094 1-81 



Potash . . . 1-604 0-27 1-873 0'31 



Water . . . 20-412 18-14 20-412 18-14 



Hence the quantities of oxygen contained in the alkaline 

 bases, including the lime, the alumina, the water and the 

 silica, are as the numbers 1, 3, 6, 8, as in most Chabasies. 

 The chemical distinction between the two minerals appears 

 to consist in the relative quantities of lime and soda contained 

 in them, most lime being contained in Chabasie. Gmelinite 

 forms a jelly with hydrochloric acid, Chabasie does not. 



XVII. Observations on Elaeolith and Nepheline. By THEO- 

 DORE SCHEERER.* 



IN the 46th volume of PoggendorfFs Annalen^ p. 291, I 

 communicated a notice on an elaeolith which is found near 

 Brevig in Norway. I considered myself justified, from the 

 results of the analyses made with it, in advancing a new for- 

 mula for this mineral, which seems to be more in harmony 

 with its composition than the one hitherto employed. I had 



* Communicated by the Author. 



