100 
DR. ANDREWS ON THE HEAT DISENGAGED 
O O O 
First increment . . 
. 2T2 
213 
211 
Second increment . 
. 003 
0-06 
007 
Third increment. . 
. 003 
0-02 
003 
Fourth increment . 
. 014 
OTl 
0-17 
Fifth increment . . 
. 0-23 
0-17 
0-25 
Sixth increment . . 
. 0T8 
016 
0-20 
Seventh increment . 
. 0-13 
0T5 
0-23 
Eighth increment . 
. 0-11 
0-11 
0-16 
The sudden increase in the amount of the increment which took place after the 
agitation had continued for six minutes is very remarkable, and it occurred uniformly 
in all the experiments. It plainly shows that some new voltaic or chemical action 
occurred at that time, with the nature of which I am not precisely acquainted. No 
analogous irregularity occurred with any of the other salts of silver which were ex- 
amined. 
Salts of Silver with Copper. 
All the solutions of silver in these experiments contained the same quantity of 
silver. 100 grins, of each, precipitated by hydrochloric acid, gave 0‘600 grm. chloride 
of silver. The copper had been reduced from the oxide by hydrogen, and about 2 grms. 
were taken in each experiment. 
Sulphate of Silver and Copper. 
I. Air 13°’9. Increment found 0°'73, corrected 0°'68. 
II. Air ]3°‘7. Increment found corrected 0°'69. 
III. Air 12°'7- Increment found 0°-76, corrected 0°’71- 
I. II. III. Mean. 
159° 161° 166° 162°. 
Acetate of Silver and Copper. 
I. Air 13°'4. Increment found 0°-68, corrected 0°-67. 
II. Air 12°'8. Increment found 0°-7l, corrected 0°'66. 
III. Air 12°‘8. Increment found 0°'71j corrected 0°’66. 
I. II. III. Mean. 
157° 155° 155° 156°. 
Nitrate of Silver and Copper. 
I. Air 13°'8. Increment found 0°-74, corrected 0°‘70. 
II. Air 13°-0. Increment found 0°*75, corrected 0°70. 
III. Air 12°‘8. Increment found 0°77, corrected 0°72. 
I- II. III. Mean. 
164° 169° 169° 166°. 
