DESTRUCTIVE DISTILLATION OF ANIMAL MATTERS. 



575 



{6-036 grains of nitrate dried in vacuo gave 

 9-377 ... carbonic acid and 



2 324 ... water. 



{4*455 grains obtained from the mother liquor of the previous crop gave 

 6-889 ... carbonic acid and 

 1-733 ... water. 



{7*118 grains of nitrate dried at 212° gave 

 11009 ... carbonic acid and 



2-767 ... water. 



Experiment. 



Calculation. 



III. 



Carbon, 

 Hydrogen, 

 Nitrogen, 

 Oxygen, 



42-31 

 4-40 



42-37 

 4-28 



42-17 

 4-32 



IV. 



42-18 

 431 



42.25 



4-22 



19-73 



33-80 



10 



0„ 



60 



6 



28 



48 



100-00 142 



These results correspond completely with the formula C 10 H 3 N HO N0 5 . 



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. 



f 21-012 grains bisulphate of pyridine, gave 



\ 27*867 ... sulphate of baryta= 45-50 per cent, of sulphuric acid. 



The formula C 10 H 6 N 2HO S0 3 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 — 



{8-525 grains aurochloride gave 

 46-40 ... carbonic acid and 

 1-450 ... water. 



T f 7 "350 grains aurochloride gave 

 " { 3-440 ... gold. 



TT f 5-480 

 li * { 2-565 



5-480 grains aurochloride gave 



gold. 



VOL. XXI. PART IV. 



( Q 



