Miscellanies. 195 



beck und A. Henry. — Societies : — Proceedings of the Linnsean Society ; 

 Royal Society of Edinburgh; Entomological Society ; Botanical Society; 

 Zoological Society. — Miscellaneous. 



22. Analysis of Gmelinite or Hydrolite; by A. Connell, Esq., F. R. 

 S. E., &c. (Jameson's Journal, No. 48, p. 360.)— Mr. Connell finds that 

 17.67 grs. of this mineral from the County of Antrim, in Ireland, are 

 composed exclusive of water of 



Silica, - - - 8.581 



Alumina, - - - 3,19 



Lime, - - - 1.084 



Soda, - - - .682 



Potash, - - - .069 



Oxide of iron, - - .02 



13.626 



To determine the quantity of water, a portion of the crystals was igni. 

 ted in a platinum crucible, and charcoal fire, when the loss of weight 

 amounted to 21.66 per cent. We have thus, in 100 parts of the mineral. 



Oxygen contained. 



98.75 

 It sufficiently appears, both from the analysis of Vauquelin* and from 

 that here detailed, that this mineral is nearly allied to chabasite, in a 

 chemical point of view, as according to Mr. Haidinger,f it is crystallo- 

 graphically ; and it is not impossible that if analysis applicable to differ- 

 ent localities were repeated and sufficiently extended, the chemical for- 

 mula for chabasite might be found to embrace gmelinite. It does not, 

 however, apply to the above analysis, and still less to those of Vauquelin. 



t Mohs's Mineralogy, fig, 195. 



100.00 98.50 



