A, f. Leeds—Dissociation of certain Compounds. 199 
a very dilute solution diffused itself, rendering it difficult not 
to overstep the temperature actually requisite. 
Reaction of 
Liquid. Liquid. Partsin 100.) Temp. |Mean.| Reaction of Vapor. 
|Ammonic Chloride, Feebly acid. | 10-60 37°C./a70 [Strongly alkaline. 
4b “a “ ‘i 37° its +e 
bs " i : 38° o.-| Alkaline. 
te te ts tig ‘ 39° 38°°5 “s sc 
a its 2°65 39° a“ “ 
SE os ee 40° /39°°3|Feebly alkaline. 
“ 4 “ “ 9° “ ie 
- . 1°325 39° 39° “ “ 
“ 6 ‘ 47° 39°-2 “ “ 
ts “ “ 38° 39° ts “ 
Ammonie Sulphate, Acid. 45°62 50° 50°5 Alkaline. 
ae “ “ ‘“ 51° “ 
“ “ “ 9. ° ‘ “ 
‘6 “ “ 22-81 ade 2 te rT} 
" “ 11°40 50°5 |, 90.5|Faintly alkaline. 
id “ 73 50° 5 “ “ 
Ammonic Oxalate. Strongly alk.|Saturated.. —1° |—1° |Strongly alkaline. 
iy z at 7°56 C,| —1° ; 
Ammonic Acetate. Acid. Saturated.) 55° /... Alkaline. 
at 19°C; 55° a 
The ammonic oxalate was surrounded by a freezing mixture, 
_Finally, this point of sensible dissociation depends on the 
circumstances of thé experiment, and the delicacy of the appa- 
Tatus and reagents employed in its detection. For when a 
thermometer and a coil of paper supported at the distance of 
experiments, tabulated above, it was reddened at the expira- 
s du 
bubbles into the vacuum above the liquid. The temperatures 
of sensible dissociation above given are not to be rdec 
therefore as absolute, but as relative and valuable only as indi- 
cative of the comparative dissociability of these salts when in 
aqueous solution. 
Stevens Institute, Jan. 19th, 1874. 
Am. Jour. ee Vou. VII, No. 39.—Marcu, 1874, 
