contained in Coal-gas Naphtha. 263 



dissolves it more readily than cold. It is abstracted from a 

 watery solution by aether. Alcohol, hydrate of oxide of me- 

 thyle, acetone, aldehyde r sulphuret of carbon, fatty and essen- 

 tial oils, are miscible with leucol in every proportion. It be- 

 comes cloudy with hydrochloric acid, and gives the same re- 

 action as cyanol with dahlia paper. It resembles this body 

 also in its behaviour towards sulphur, phosphorus, arsenic, 

 camphor, colophony, copal and caoutchouc. Leucol does not 

 coagulate albumen. 



The strong dispersive and refractive power of this body is 

 very remarkable; in this respect it greatly surpasses cyanol. 

 Its index of refraction is 1'645, exactly the same as that of 

 sulphuret of carbon. 



It is a very bad conductor of electricity, as the deviation of 

 the galvanometer was still smaller than with cyanol. 



Leeches are killed when submerged in an aqueous solution 

 of this base. I injected about 0*5 grm. of this base, mixed 

 with water, into the throat of a rabbit, but spasms were not 

 brought on, as with cyanol. The animal, after once throwing 

 back convulsively its head, was seized with a total prostration 

 of all strength, which lasted for some hours. The pupil did 

 not sensibly dilate, and when the oil was dropped into the eye, 

 a contraction took place. On the following day the rabbit 

 had perfectly recovered. 



Leucol is distinguished in its reactions from cyanol, by not 

 producing a blue colour with solutions of chloride of lime or 

 chromic acid. 



This base produces ill sulphate of copper a light blue pre- 

 cipitate, which is not altered by boiling. The precipitates 

 produced by leucol in solutions of the salts of peroxide of 

 iron, alumina, chlorides of mercury, platinum, palladium, gold, 

 antimony and protochloride of tin, correspond, both in colour 

 and other properties, with those produced by cyanol. It ren- 

 ders the solution of salts of lead and sulphate of protoxide of 

 iron slightly turbid, and gives with infusion of galls a brownish- 

 yellow deposit, which is peculiar to the organic bases. The 

 solutions of other reagents are not changed by leucol. 



Combinations of Leucol. 



Leucol dissolves readily in all acids with evolution of heat, 

 but its salts, like those of nicotine and coniine, are not ob- 

 tained in a crystallized state with facility, which distinguishes 

 them from the analogous compounds of cyanol. Coniine is in 

 its saturating capacity the next to leucol. 



The odour of the base disappears entirely in its salts. The 

 fixed alkalies decompose its compounds, the leucol separating 



