SeS Intelligence and Miscellaneous Articles. 



acquires a deep yellowish-red colour ; this solution is to be supersa- 

 turated with hydrochloric acid, which precipitates the humopinic 

 acid, resembling in appearance hydrated -peroxide of iron. It is to 

 be washed in alcohol, which leaves a Ught residue of a dull substance. 

 The alcoholic solution, when dropped gradually into water, forms 

 with it an emulsion of a deep peach-red colour. 



By evaporating the alcohol, the humopinic acid remains in the 

 state of a deep brown mass. 



The properties of humopinic acid are, that it is an amorphous 

 substance of a deep brown colour. It melts when heated, and burns 

 with flame, and emits an odour of narcotina. It is insoluble in weak 

 acids and in water ; the alcoholic solution is of a deep yellowish-red 

 color,' .-. alkalies dissolve it, forming a saffron-coloured solution. 



These solutions give deep brown gelatinous precipitates, with the 

 salts of lead and barytes. When this acid is long boiled in water, it 

 becomes insoluble in ammonia, the alkalies and alcohol merely dissolve 

 it with rp' .e difficulty, and always leave a blackish-brown insoluble 

 substance, which resembles humin perfectly. 

 It appears by analysis to be composed of, — 



Carbon 64*4 



Hydrogen .... 5"1 



Oxygen 30-5 



100- 

 Ann. de Ch. et de Phys., October 1844. 



ANALYSIS OF THE METEORIC IRON OF GRASSE. 

 BY LE DUC DE LEVYNES. 



The author states the following as the analyses hitherto published, 

 which sho\y the greatest quantity of nickel in various specimens of 

 meteoric iron : — 



Iron of Elbogen, by John, 8*75 per cent. Iron of Hradschina, 

 [Agram] by Wehrle, 8*88; by Holger, 11-84. The Louisiana iron, 

 by Shepard, 9-67. The Potosi, by Morren, 9-75. The Siberia, last 

 analysis by Berzelius, 10*73. Iron from the Cape, by Tennant, 10 ; 

 by Wehrle, 12^27. The iron from Claiborne, North America, by 

 Jackson, 24*70 per cent. 



The Grasse iron did not appear to contain either sulphur, silica or 

 cobalt ; it yielded, — 



Iron 82*63 



Nickel 17'37 



Too^ 



It contained also traces of manganese and copper. — Annates des 

 Mines, tome v. 161. 



ON COTARNINA. BY M. WOHLER. 



This name is given by the author to a new organic base which is 

 produced along with opianic acid ; it contains azote iinr rcotina. 

 It occurs in the mother-waters from which opianic aci'.jV "d 



In order to separate it from the sulphate of manganese and undeca.^*- 



