Intelligence mid Miscellaneous Articles. 157 



throws out tlie suggestion, whether this peculiarity in the locus of 

 iron may not in some way relate to the absence of the red colouring 

 matter of the blood. The colour of chyle has been generally sup- 

 posed attributable to the fatty matter contained in it ; Dr. Rees, 

 however, is of opinion that the white matter mentioned above as 

 analogous to that existing in the saliva, has a considerable share in 

 the production of the opake milky character of the chyle. 



NEW MINERAL FROM LANGBANSHYTTA, NEAR FAHLUN ; DE- 

 SCRIBED AND ANALYSED BY PROFESSOR O. B. KUHN OF 

 LEIPZIG. 



This mineral lies immediately on a grayish-black mass, of a me- 

 tallic lustre, which contains oxide of iron, but no trace of arsenic ; 

 and this mass itself lies on fine-grained bitter-spar. 



The colour of the mineral is in some places like pale honey, in 

 others dirty white ; but there are no definite limits between two dif- 

 ferently-coloured parts. It is of a waxen lustre. Its specific gravity, 

 determined in water, is 2-52 ; its hardness between 5 and 6 ; it is 

 brittle and easily pulverized ; only in one direction could I perceive 

 foliated cleavage ; in that one the fragments are tolerably even, but 

 in all other directions it splits unevenly. 



Heated by itself with the blow-pipe it becomes gray, but does not 

 melt even at the edges ; heated in a glass tube it does not yield the 

 smallest quantity of water ; with borax and phosphoric salt it effer- 

 vesces, and a smell resembling that of arsenic is evolved ; both glasses 

 are, when melted on platina, transparent, and in every respect nearly 

 colourless ; with soda there is, in like manner, effervescence ; and 

 indications of manganese are more or less strongly marked in differ- 

 ent specimens. 



In nitric acid it is perfectly soluble, with greater or less efferves- 

 cence, in different specimens, though it is in all but trifling : in the 

 fluid we can detect lime, magnesia, some manganese, besides a trace 

 of iron and much arsenic acid : also a trace of chlorine. Fluorine 

 was not to be found in the mineral. 



Three analyses have given the following results expressed in num- 

 bers : — 



Lime 23-22 21-31 20-96 



Magnesia 15-681 ^^.^^ 15-61 



Protoxide of manganese ... . 2-13 j 4-26 



Iron, only a trace 



Arsenic acid 58-52 56-56 



Loss by ignition 0'30 2-95 



Insoluble m-atter 0-23 



99-85 99-57 



Though the last analysis was even made with the greatest possible 

 care, still the great difference between tlie quantities of lime and 

 manganese cannot be accounted for; still more the quantity of 

 manganese varies in different parts, which, indeed, might be ex- 

 pected from its external appearance ; and then, according to the 

 law of isomorphism, it replaces an equivalent quantity of lime. We 



