DESTRUCTIVE DISTILLATION OF ANIMAL MATTERS. 575 
9°377 ... carbonic acid and 
6:036 grains of nitrate dried in vacuo gave 
II 
2°324 cep aNTAtel, 
6-889 ... carbonic acid and 
4455 grains obtained from the mother liquor of the previous crop gave 
IIL. 
1-733... - water. 
7-118 grains of nitrate dried at 212° gave 
IV. < 11-009 ... carbonic acid and 
2°767 «-. water, 
Experiment. Calculation. 
I. I. Ii. Iv. 
Carbon, 42°31 42°37 42:17 42°18 42.25 C,o 60 
Hydrogen, 4:40 4:28 4°32 431 4-22 H, 6 
Nitrogen, otig nt: 285 990 19°73 N, 28 
Oxygen, abc ae nae ae 33°80 0, 48 
100-00 142 
These results correspond completely with the formula C,,H,N HO NO,,. 
Bisulphate of Pyridine.-—When sulphuric acid is supersaturated with pyridine, 
and evaporated in the water bath, a crystalline mass is left which is deliquescent, 
and soluble in all proportions in water and alcohol, but insoluble in ether. Its re- 
action is highly acid, and analysis showed it to be a bisulphate. 
21:012 grains bisulphate of pyridine, gave 
27:°867 ... sulphate of baryta=45-50 per cent. of sulphuric acid, 
The formula C,,H,N 2HO SO, requires 45:19. 
Double Salts of Pyridine. 
The platinochloride of pyridine has been already described in the second part 
of this investigation. 
Aurochloride of Pyridine—This salt is immediately thrown down as a fine 
lemon-yellow crystalline powder when chloride of gold is added to a solution of 
hydrochlorate of pyridine. It dissolves readily in hot water, and is deposited, on 
cooling, in fine yellow needles, little soluble in cold water, and insoluble in al- 
cohol. Analysis gave— 
46:40 ... carbonic acid and 
8°525 grains aurochloride gave 
1450 ... water. 
y {7350 grains aurochloride gave 
" (3-440... gold, 
ll 5:480 grains aurochloride gave 
* 12565 ... gold. 
ba 
VOL. XXI. PART IV. 
