403 
on the rates of chronometers. 
The following are examples derived from the experiments 
performed with the condenser. 
Examples of Chronometers having nearly regained their original rates, after 
being subjected to different Pressures in the Condensing Engine. 
Detached 
// 
4 7-3 
Detached 
+ 
// 
43 
Detached 
II 
+ 0.2 
Detached 
// 
4 7-5 
40 in. 
+ 3-* 
75 in - 
— 
17.2 
75 in - 
— 9.5 
90 in. 
— 2.2 
Detached 
+ 74 
Detached 
4 
45 
Detached 
— 0.6 
Detached 
48.7 
Detached + 4. 
90 in. — 5. 
Detached + 3.4I 
A similar restoration of rate was found also to take place 
by removing a chronometer from rarefied to condensed air, 
and afterwards restoring it to air of the previous density, as 
exemplified in two instances in the next table. 
Examples of Chronometers having nearly regained their original 
rates, after being removed from rarefied to condensed air. 
Mean Pressure. 
Mean daily rate. 
Mean Pressure. 
Mean daily rate. 
23 inches. 
90 inches. 
23 inches. 
4- ll". 6 
- 1 - 1 .6 
-J- 12 .8 
23 inches. 
90 inches. 
23 inches. 
+ 5" 5 
— 4 .4 
“|” 6 . 1 
It was also found, that by restoring the above chronometers 
to air of any other density than that from which they were 
originally taken, the rate would not return to its primitive 
quantity. When, for example, they were placed under a 
pressure of 21 inches, the rate of the first chronometer be- 
came + i4".2 instead of -J- 11". 6; and the daily increase of 
the second + 7". 2, instead of -j- 5". 5 ; results in exact con- 
formity with the general law which regulated the same chro- 
nometers in other experiments. 
"4“ o 
