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pes Proceedings of the British. Association 
Arthur Connell:communicated some additional — on 
the voltaic decomposition of alcohol ; his experiments appearing 
to him to prove that water exists as ihe] in absolute alcohol. 
On the compound or radieal called kakodyl, by Prof. Bunsen of 
Marburg. Thisisanew radical resembling alcohol, in which arse- 
nic replaces the oxygen of that compound. © The oxide of kako- 
dyl has so great an affinity for oxygen, that when exposed to the 
air it immediately inflames. The bodies produced by the com- 
bustion are arsenious acid, carbonic acid, and water. By the fur- 
ther oxidation of the oxide of kakodyl, kakodylic acid is produ- 
ced. 'The sulphuret of kakodyl is similar in composition to the 
oxide, and participates in many of its properties. The telluret, 
selenuret, iodide and bromide of kakodyl were also examined. 
The danger attending these experiments is very great, and the 
poisonous effects produced by the inhalation of the vapor, were 
described as dreadful. Kakodyl is produced from the liquor of 
Cadet, and is extremely interesting as being a link connecting 
organic and i inorganic chemistry. Prof. B. is engaged in fartfler 
experiments on this subject, and has already obtained many new 
—— 
of preparing Morphine and its salts, by Dr. 
Mobs, of Coblentz. This mode of separating morphine from. nar- 
ing it in an excess of caustic lime, and precipitating it by mu- 
riate of ammonia. . This method of precipitation is in principle 
cotine, and all. other: heterogeneous substances, consists in dissolv- 
very similar to the precipitation of alumina, from a solution in 
caustic potash. The process is as follows: the opium is boiled 
in water, in which it readily dissolves; the decoction is strained 
through a linen cloth and the dregs are pressed ; this operation of 
boiling and straining is repeated twice on the same quantity of 
opium, and the solution of the whole concentrated until its 
weight is four times that of the opium employed. The concen- 
trated solution is, while still warm, mixed with milk of lime, pre- 
pared with a quantity of dry lime equal to the fourth part of the 
weight of the opium. The mixture is heated till it boils, and is 
filtered through linen while hot. The filtered liquor has a light 
brown yellow color. While still hot it is mixed with pulverized 
sal ammoniac in excess; the lime is saturated with muriatic acid, 
ammonia is set free, and the morphine is precipitated. When the 
solution is greatly concentrated, the precipitation is instantaneous, 
att 
