4-76 Intelligence and Miscellaneous Articles. 



Dr. Anderson submitted the codeia to analysis, and deduced from 

 his results the formula C 36 H 21 NO 6 , giving in 100 parts — 



Carbon 72'24 



Hydrogen 702 



Nitrogen 4*68 



Oxygen 16*06 



100-00 

 which agrees with the previous determination of Regnault. 



Codeia crystallized from water or from hydrous sether is obtained 

 in crystals, often of considerable size, belonging to the right pris- 

 matic system, and presenting a considerable number of modifications. 

 These crystals contain two equivalents, or 5*67 per cent, of water. 



Codeia is an extremely powerful base, rapidly restoring the blue 

 of reddened litmus, and precipitating oxides of lead, iron, cobalt, 

 nickel, and other metals from their solutions. It is precipitated by 

 potash from its salts, and is generally stated to be insoluble in that 

 alkali ; but this is true only of very highly concentrated solutions, 

 as a considerable quantity of strong potash may be added to a satu- 

 rated solution of codeia in water without producing precipitation ; 

 and even when a large amount of potash is added, a certain quantity 

 of the base is still retained in solution. Codeia is soluble in am- 

 monia, but not more so than in water: 100 parts of a moderately 

 strong solution of ammonia dissolved, at 60°, 1*46 part of codeia; 

 and according to Robiquet, 100 parts of water, at 59°, dissolve 1*26 

 parts. Contrary to what is usually stated, Dr. Anderson found that 

 codeia is precipitated from all its salts by ammonia ; it does not, 

 however, fall immediately, but is slowly deposited in small transpa- 

 rent crystals. — Trans. Royal Soc. Edinburgh, 1850. 



ON HYPOCHLOROUS ACID AND THE CHLORIDES OF SULPHUR. 

 BY M. E. MILLON. 



The author states, that when an aqueous solution of chlorine is 

 kept in bottles not exposed to light, it is preserved without any ap- 

 preciable change ; but if this solution be exposed for some time to 

 the direct influence of the solar rays, peculiar reactions occur. Thus 

 chloride of lead is thereby converted into pure oxide, and the chlo- 

 ride of manganese gives a black precipitate of peroxide ; whereas 

 fresh solution of chlorine does not in any way modify these two 

 chlorides. 



In examining to what combination of chlorine this characteristic 

 oxidizement of the chlorides of lead and manganese belonged, M. 

 Millon found that it resided exclusively in the hypochlorous acid. 

 This acid, CIO, may thus be recognized when contained in a solution 

 of chlorine, even in very small quantity ; for these two reagents, and 

 especially that of manganese, are extremely sensible. 



This action of chlorine on water is evidently identical with that 

 of chlorine on the greater number of hydrogenated substances ; water 

 is substituted for hydrogen ; and if the phenomenon is limited, it is 



