PRODUCED BY DISTILLATION OF CINCHONINE. 313 
fectly dry state. The mass dissolved immediately in strong alcohol, showing the 
absence of ammonia. To the solution, a slight excess of bichloride of platinum 
was added, when a voluminous precipitate (z) was obtained ; the mother liquor of 
a, on evaporation, gave a crop of crystals 6, the fluid from which gave another 
crop ¢. 
The precipitate a was the first examined ; it was dissolved in hot water, and 
on cooling deposited a crop of crystals, which was evidently a mixture, for it con- 
sisted of large orange crystals a’, and exceedingly small needles a*; a’ was capable 
of being perfectly freed from a* by sifting through muslin; the latter was not, how- 
ever, absolutely free from small fragments of a’, and was therefore further ex- 
amined, as will be presently seen. 
5-295 grains of a5 dried at 212° gave 
1-625 see platinum, 
or 30°69 per cent., a number intermediate between lutidine and collidine. 
The mother liquid of the crops a* and a* gave a crystalline deposit a’, which 
had the same crystalline form and appearance as @*, but a little more brilliant in 
colour. 
4-955 grains of a? dried at 212° gave 
1520 ... platinum, 
or, 30°67 per cent. It will be seen, therefore, that a and a’ agree not only in 
form but also in composition. 
The mother liquid of a? on evaporation over sulphuric acid, gave another crop 
a”, which was, therefore, the third crop from a. 
2-245 grains of a> dried at 212° gave 
‘740 ~... platinum, 
or 32:96 per cent., which is almost exactly the theoretical percentage in picoline for 
Experiment. Theory. (Picoline.) 
32:96 32°94. 
It has been said that a* contained a little of a* intermixed; it was therefore 
treated with hot water, which separated it into two portions, one less soluble a’, 
and a solution which on cooling deposited a crop of crystals a°. The portion of 
a which was present was very minute, and remaining in solution did not effect 
the results given by a’ and a’. 
3°205 grains of a® platinum salt gave 
1010 .., platinum, 
or 31°51 per cent. 
Experiment. Theory. (Lutidine.) 
_ 351 31-51 
3:970 grains of a® platinum salt gave 
1150 ... ... platinum, 
or 28:96 per cent., a number intermediate between chinoline and lepidine, presently 
VOL. XXI. PART II. 4p 
