284 Notices of the Labours of Continental Chemists. 



hoi would be reduced to the green chloride ; this agrees with 

 Warington's experiments. — H. C] 



On Glucinium and its Compounds. 



Awdejew has made a series of experiments on the salts of 

 glucina, under the direction of H. Rose. Great care was used 

 in the preparation and analysis of the chloride of glucinium. 

 It was found to contain 87*54 per cent, of chlorine, whereas 

 it has been supposed to contain only 66*70. When dissolved 

 in water it forms hydrochlorate of glucina ; on evaporating the 

 solution a crystalline mass is obtained which has the composi- 

 tion GC1 + 4 aq. [Awdejew supposes the oxide to contain one 

 atom of oxygen.] The atomic weight of the oxide was de- 

 termined from the analysis of the neutral sulphate, which is 

 obtained by dissolving the carbonate in excess of sulphuric 

 acid and separating by alcohol ; the salt is precipitated and 



may be dissolved and recrystallized ; its formula is G S + 4 aq. 

 The atomic weight of glucina is, according to these analyses, 

 158*084, and that of the metal 58*084. A double sulphate of 

 glucina and potassa may be obtained by gently evaporating 

 a mixture of equal atoms of the two sulphates ; it is decom- 

 posed by boiling, slowly soluble in cold water. Its formula is 



KS + GS + 2aq. Itmightbe 3 K S + G S 3 , but KS+J} S 3 

 cannot be formed. The double fluoride of glucinium and 

 potassium was also analysed ; it is K F + G F ; it is anhydrous, 

 difficultly soluble. There are three basic sulphates which 

 have been described and analysed by Berzelius (Lehrbuch, iv) . 



These formulas, according to the new equivalent, are G 3 S, G 2 S 



and G 6 S + 3 aq. At the end of his treatise Awdejew consi- 

 ders how the formulas of minerals containing glucina are af- 

 fected by this change in the atomic weight. Chrysoberyll 



becomes G Al; phenakite G 3 Si; beryll GPSi + Al Si; 



euklas 2 G 3 Si +A1 2 Si; leucophane G 3 Si+Ca 3 Si 2 + Na F 

 — (Pogg. Ann., vol. lvi. p. 101.) 



In vol. 1. of the same Journal Count Schaffgotsch published 

 some experiments on glucina. He analysed the hydrate, and 



gave as its formula G-f8aq; according to the new atomic 



weight G 3 + 4 aq would agree best with the analysis ; the 

 oxide is dissolved by concentrated caustic potassa, and is not 

 precipitated by boiling, unless the solution be diluted, when 

 the whole is thrown down. By boiling the solution of glucina 



