696 NEW GENERAL METHOD OF PREPARING THE PRIMARY MONAMINES. 
traces of chloride of ammonium. This solution was precipitated with chloride 
of platinum, the precipitate washed with alcohol, dried in the water-bath, and — 
then—at 120° C.— 
‘591 grms. taken, after ignition left ‘2365 grms. platinum = 40° per cent. 
067 ,, gave : : OD ones » = 41:04 se 
and at a different time— 
10155 grms. left 4355 germs. platinum 42°6 per cent. 
12236 il saoes F. » = 42:7 > 
but these were made from hydrochlorate not so thoroughly freed from chloride ; 
of ammonium. By calculation— : 
Ammonium chloro-platinate gives 44:18 per cent. Pt. 
Methylamine _,, bl) tee te » 
Dimethylamine _,, 7 OUI ss » 
Trimethylamine _,, Bie at » 
A. portion of the twice purified hydrochlorate was taken for the estimation of 
the chlorine, which was done volumetrically. 1 c.c. of the silver solution=-001 — 

erms. chlorine— ; 
, : 
‘051 grms. required 27°5 c.c. = 53°9 per cent. Cl. } 
‘08 ” 44: 3: Sin 53°7 » ” 4 
11825 s ba 4 = oem — 55 Fe j 
Per cent. of chlorine by calculation in hydrochlorate of methylamine = 52°74 : 
per cent. of chlorine in chloride of ammonium = 66°35. + 
Of the hydrochlorate of ethylamine made by this process— j 
114 germs. required 504 ¢.c, = 4421 per cent. Cl. i 
‘107 5 47: » = 43°83 ” ”» Ey 
ass i, 50; ht Aad Ty, ogni : 
By calculation, the percentage of chlorine in hydrochlorate of ethylamine = 4355.5 
1895 grms. of the ethylamine chloro-platinate gave ‘077 grms. patina 
=40°7 per cent. Calculated percentage, 39°36. 
‘24 grms. of the isobutylamine salt gave ee erms. platinum = 36-2 per 
cent. Pt. Calculated percentage, 35:4. 
