Intelligence and Miscellaneotis Articles. 395 



PREPARATION OF ARSENIURETTED HYDROGEN. BY VOGEL. 



When two equivalents of zinc are melted and one equivalent of povir- 

 dered metallic arsenic added, they combine after stirring the mixture, 

 which without any fresh application of heat becomes suddenly red 

 hot. A little arsenic volatilizes, which burns on the surface of the 

 mass with a blue flame. If we take equal equivalents of the two 

 metals, the same evolution of heat occurs, but not to so great an ex- 

 tent, and the mixture cools more quickly. Antimony fused with zinc 

 does not produce this phsenomenon. This alloy of arsenic and zinc 

 when pulverized and treated with hydrochloric acid, evolves arseni- 

 uretted hydrogen free from any traces of precombined hydrogen gas, 

 as it is completely absorbable by a solution of sulphate of copper ; 

 and therefore affords the readiest and most convenient mode of pro- 

 curing this gas free from admixture. — Journ.fur Pract. Chemie, 6. 

 343. 



[The Editors are obliged to Dr. Golding Bird for the preceding 

 notices from the German.] 



TUNGSTATE OF TUNGSTEN AND POTASH. 



M. Laurent prepared this salt by the method employed by M. 

 Wcehler for the corresponding salt of soda. This tungstate cry- 

 stallizes in small needles, whilst the soda salt is in small cubes. 



M. Laurent states that the colour of this salt is extremely beau- 

 tiful; it is of a deep coppery violet colour, and very brilliant 

 when looked at in the sunshine ; it very perfectly resembles sub- 

 limed indigo ; and, what is remarkable, when burnished it becomes, 

 like indigo, of a line blue with coppery reflections. The corre- 

 sponding salt of soda, whatever may be its colour, becomes blue by 

 friction. — An. de. Ch. et de Ph. Ixvii. 219. 



ANALYSIS OF SERUM OF BLOOD DRAWN FROM A DIABETIC 

 PATIENT. BY DR. G. O. REES. 



Water 908*50 



Albumen (yielding oxide of iron and phosphate of 



lime by incineration) 80'35 



Fatty matters 0*95 



Diabetic sugar 1-80 



Animal extractive soluble in alcohol, and urea . . 2' 20 



Albuminate of soda 0*80 



Alkaline chloride with trace of phosphate .... "1 



Alkaline carbonate, trace of sulphate, the results > 4*40 



of incineration J 



Loss 100 



100000 

 Guy's Hospital Reports, Oct. 1838. 



ANALYSIS OF THE LIQUOR AMNII. 



Four specimens of this secretion recently examined by Dr. G. 0. 

 Rees, and described in the Guy's Hospital Reports, have yielded 



