282 ON THR COMBINATIONS OF 
He says that “to know how far these num- 
bers accord with the theory of Dr. Irvine, at 
present universally admitted, viz. that the heat 
evolved when oil of vitriol and water are mixed 
is owing to the diminution of the specific heat, 
we must make a comparison of the specific 
heats above found with the specific heat of the 
mixture, supposing it a mean of the specific 
heats of the acid and water without any change;” 
Water 2.0 2% 
ecitic 
eats. 
.|1.0000 
1 eo 1 Wester 0.3593 
+2 © {0.4707 
+3 << |0.4786 
A Ariel DLL 
+5 © {0.5690 
+6 “© 10.6091 
+7 “© 10.6429 
+8 *€ 10.6699 
+9 << 10.7003 
+O (\O:7201 
which he does in the following table. 
ce 
Wiettetois ion 51 ote, 
Acid. Water. 
1 atom +1 atom 
ce +2 
“ee +3 
“44 
«45 
« +46 
«47 
« 48 
“ +9 
“« +410 
1.0000 
0.3593 
0.4707 
0.4786 
0.5228 
0.5690 
0.6091 
0.6428 
0.6699 
0.7003 
0.7201 
Specitic Heat 
by Experiment] Specific Heat. | Differences 
Mean 
0.4587 
0.5326* 
0.5869 
0.6306 
0.6660 
0.6952 
0.7197 
0.7405 
0.7585 
+0.0120 
— 0.0540 
— 0.0641 
— 0.0616 
— 0.0569 
— 0.0524 
— 0.0498 
— 0.0402 
—0.0584 
* This is not exactly correct, it ought to be 0.5314. 
