338 Dr. Hare’s Deflagrator and Calorimotor. 
1. I connected the zine pole of the Calorimotor, with the 
copper pole of the troughs, and vice versa, and then dividing 
the troughs (containing three hundred pairs of four inch 
plates,*) at another place, connected them at these new poles 
by points of well prepared charcoal; the sparks passed free- 
ly and vividly, nor did it, apparently make any difference, 
whether the plates of the Calorimotor, were immersed in 
the fluid, or not. I then disconnected the troughs from 
the Calorimotor, and connecting them together, received the 
spark, which was quite as vivid, as when the Calorimotor 
formed a part of the series. I now immersed the Calori- 
motor, and found that it acted by itself, with its appropriate 
energy, readily igniting iron, and displaying its usual mag- 
netic activity. a: 
2. The Calorimotor and Deflagrator were connected in 
such a manner, that the former was interposed between the 
two equal divisions of forty coils each, contained in the two 
troughs of the Deflagrator ; in different trials, the connexion 
was varied, sometimes the zinc poles, and sometimes the 
copper poles of the two instruments, being connected, and 
at other times, the zinc of the one being joined to the cop- 
per of the other, and vice versa. 
When the metals of both instruments were in the air, only 
avery feeble spark passed through the charcoal points con- 
necting the proper poles of the Deflagrator. When the 
plates of the Calorimotor were immersed, those of the De- 
flagrator being in the air, the spark was not increased, but 
remained feeble as before. The coils of the Deflagrator 
being then immersed, the usual splendor of light, instantly 
burst from the charcoal points, and all the dazzling bright- 
ness and intense heat of the instrument were displayed, but 
without any increase of power derived from the Calorimotor. 
The plates of the Calorimotor were now raised from the 
fluid, those of the Deflagrator remaining immersed, but the 
light and heat were equally brilliant as before. The 
flagrator and Calorimotor were now separated, and each 
produced its appropriate effects, in full energy. ae 
3. The Calorimotor—the Deflagrator and the troughs, 
gt hundred pairs of four inch plates, were now 
connected into one series, in such a manner, that the Calor- 
1Ou chp 
* Cemented in the usual manner, into mahogany boxes. 
