394 Miscellaneous Intelligence. 



species living at present, in not having the head of a single piece with 

 the thorax. M. Germar, professor, at Halle, has given the result of 

 a similar investigation in an Entomological Journal, where he tries 

 to determine some species of those amber insects, the analogies 

 of which are not found alive at the present day. — Edin. Journ. 

 ix. 40S. 



4. Analyses by M. Arfwcdson. — Cinnamon stone of Malsjo : 



Silica" 41.87 



Alumina .... . . 20..57 



Lime 33.94 



Oxide of Iron 3-93 



Oxide manganese and magnesia .39 



100.70 



Brazilian chrysoberyl-Alumina . . 81.43 

 Silica . . . 18.73 



100.16 



Boracitc from Liincburg-boracic acid . . 69.7 

 Magnesia . . . 30.3 



100.0 



Borax, deprived of its water of crystallization, consists of 

 Boracic acid . . . 68.9 

 Soda 31.1 



100.0 



The borates were analyzed by being mixed with three or four 

 times their weight of finely-powdered fluorspar free from silica, and 

 a sufficient quantity of sulphuric acid ; on evaporating the mixture 

 and exposing it to a red heat, all the boracic acid was expelled as 

 fluoboric acid gas. The quantity of base- was then determined in 

 the usual way. 



5. Loose Crystals in a Cavity in Quartz. — Dr. Brewster has re- 

 marked the existence of a group of moveable crystals of carbonate of 

 lime lying in a fluid i - i a cavity of .a quartz crystal from Quebec, now 

 in the collection of Mr. Allan. The crystal was perfect!)' sound about 

 the cavity, which was of a triangular form, one side being about the 

 tenth of an inch long. The fluid was transparent, and as it did not ex- 

 pand much by heat, was probably water. The crystals were trans- 

 parent to a considerable degree, and had a white milky tint when viewed 

 by reflected light. Their composition is inferred from the presence of 



