528 Intelligence cmd Miscellaneous Articles. 



QiA H'o O" + 5H- O + 14Br^ = 6C- O'^ + C'^ H« Br'" O^ + 9Br= H^. 



On account of the decomposition of this substance by the alkalies 

 the author proposes to Ciill it bromoxaform. In this operation there is 

 then first ii case of oxidizement which resolves the molecule of citric 

 acid into more simple products; then the bromine acting by itself 

 on one of the products formed, gives rise to a phsenomenon of substi- 

 tution. 



On observing the preceding product so readily decomposed on the 

 presence of bases and of water, may it not be admitted that this 

 compound is first formed, and that the bromoform is merely the re- 

 sult of a secondary action ? 



The citrates of soda and barytes act in the same manner as the 

 citrate of potash, bromoform and the crystalline matter being both 

 obtained with them. — Ann. de Ch. et de Ph., Avril 1847. 



A CHEMICAL INVESTIGATION OF SOME SILICATES CONTAINING 

 CHLORINE, SULPHURIC AND CARBONIC ACID. BY M. WHIT- 

 NEY OF BOSTON, UNITED STATES. 



Long ago Arfvedson observed, in examining sodalite, that it dis- 

 solved entirely in nitric acid, although it formed a gelatine with 

 hydrochloric acid. Gustave Rose made a similar observation upon 

 cancrinite from the Ilmen mountains, which dissolves to a clear liquid 

 in concentrated hydrochloric acid, but suddenly gelatinizes on boil- 

 ing. Mr. Whitney found that a whole series of silicates, which, as 

 regards composition, exhibit great similarity to the above minerals, 

 possess the property of dissolving to a clear liquid in all dilute acids. 

 All these minerals gelatinize with concentrated acids, with the ex- 

 ception of cancrinite, which is likewise soluble in them. To this 

 series belongs, besides sodalite and the cancrinite from the Ilmen 

 mountains, elaeolite from Litchfield (Maine), noseau from the La- 

 chersee, bauijne from the Albanese mountains and from Niederme- 

 nig, and the cancrinite discovered by Dr. Jackson of Boston, along 

 with the above elacolite at Litchfield. 



The author has examined all these minerals with the greatest care, 

 and the following are the interesting results of his investigation : — 

 sodalite, noseau and hauijne, may be regarded as combinations of 

 a silicate of alumina and soda, of the composition NaO Si 0^ + 3 

 (Al- O' SiO'^}, with chloride of sodium, suljihateof soda, and sulphate 

 of lime. This silicate has hitherto never been met with in the iso- 

 lated state. It possesses the composition which was formerly 

 ascribed to elaeolite. The following are the formulae of the minerals 

 under consideration : — 



NaO Si 03 + 3A12 O^ Si 03 + Na CI, sodalite. 



NaO Si 03 + SAl-" O^ Si O^ + NaO S0\ noseane. 

 ' NaO Si 03 + 3A12 O^ Si O' + 2CaO S0^ hauyne from Albanese 

 mountains. 



NaOSi03-h3Al203SiO'-|-NaOSO' 1 hauyne from Niederme- 



2(NaO SO-' + 3AP O' SiO' + 2CaO SO' / nig. 



