294 Dv Anderson on the Properties of PicoUne. 



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Chloride of PicoUne and Mercury. — When picoline is added 

 to a concentrated solution of bichloride of mercury, a white 

 eurdy precipitate immediately falls. If, however, the solu- 

 tion be dilute, it is not precipitated for some time, and then 

 appears in the form of radiated silky needles. It is sparing- 

 ly soluble in cold water, more readily in hot. It dissolves 

 pretty abundantly in boiling alcohol, and the solution, on 

 cooling, deposits it, sometimes in prismatic, sometimes in 

 feathery crystals. It dissolves readily in dilute hydrochloric 

 acid, with the formation of a peculiar compound which I have 

 not particularly examined. Boiled with water it is decom- 

 posed, picoline being evolved, and a white powder being de- 

 posited. 



In the analysis of this compound I interposed, between the 

 combustion tube and the chloride of calcium apparatus, a small 

 tube in which the mercury and water were condensed, and at 

 the conclusion of the process, a current of dry air, heated to 

 212^, was drawn through the tube, by means of which the 

 water was conveyed into the chloride of calcium apparatus. 

 The salt was dried simply by exposure to the air, as it loses 

 picoline when heated ; when analysed it still smelt of picoline, 

 which accounts for the excess of carbon obtained. 



The following are the results of the analysis : — 



10-962 grains ichloride of mercury and pieoline gave 

 8-245 ... carbonic acid, 

 2-168 ... water. 



This corresponds to the formula Ci2 H7 N + Hg CI2, which 

 gives the following results : — 



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