28 M. C. Lea on EKithyi Bases. 
crop of crystals thus obtained were purified by several re-crys- 
tallizations, the chlorhydrate of the base was formed and from 
this the chlorplatinate which was obtained in large and beautiful 
crystals. The platinum salt was analyzed. 
4858 gms. substance gave *1567 platinum, Per cent. 
This corresponds to 32°26 
Chloroplatinate of  triviliphonine contains 82°23 
The close correspondence of the result with the number given 
by theory indicates the perfect purity of the triethylamine. Its 
icrate of pat rte crystallizes in delicate yellow needles, 
which dissolve sparingly in cold water and alcohol, abundantly 
in hot. The decrease of solubility in an aqueous or alcoholic 
solution as it cools is very sudden, so that a hot solution deposits 
almost the whole of the salt as it begins to cool. Placed on pla- 
tinum foil and gently heated, it melts, turns first red, then black, 
at the same time boiling up, takes fire, and leaves a residue of 
charcoal, 
ETHYLAMINE, 
After the least soluble salt had been removed in the manner 
just described, the mother water deposited another crop of crys- 
tals, which were purified by repeated recrystallization, the chlor- 
hydrate of the base was formed, and its chlorplatinate was 
analyze 
4429 oms, substance gave *1728 platinum, Per cent. 
This corresponds to 39°02 
The chloroplatinate of ethylamine contains 39°29 
Picrate of ethylamine presents great ae of appearance 
according to accidental circumstances n first crystallizing 
out of the mixed solution it usually forms soit of short brown 
prisms adhering to the bottom of the basin. If these be recrys- 
tallized we obtain long yellow flattened prisms and lamine, ex- 
tending in every direction through the liquid—few substances 
exhibit more beautiful cry: stallization. A dilute alcoholic solu- 
tion often deposits flat pages bevelled at the extremities, and 
sometimes hexagona 
on solubility in water this pea? ap agent to the pi- 
crate of ammonia, to which, after og eae re- 
aie rerystallizations it bears insideretls aeeutiiien in 
appearance 
DIETHYLAMINE. 
After the picrate of ethylamine has been for the most part 
removed, the mother waters exhibit a curious phenomenon which 
