Hare’s Calorimotor. © ~ 421 
That a peculiar combination between heat and light exists in 
the solar beams, is evident from their not imparting warmth to 
a lens through which they may pass, as do those of our culinary 
fires. ‘ : 
Under this view of the case, the action of the poles in Gal- 
vanic decomposition is one of complex affinity. The particles 
of compounds are attracted to the different wires agreeably to 
their susceptibilities to the positive and negative attraction, and 
the caloric leaving the electric fluid with which it had been 
combined, unites with them at the moment that their electric | 
state is neutralized. . 
As an exciting fluid, I have usually employed a solution of 
one part sulphuric acid, and two parts muriate of soda with 
seventy of water? but, to my surprise, I have produced nearly 
a white heat by an alkaline solution barely sensible to the taste. 
For the display of the heat effects, the addition of manganese, 
red lead, or the nitrates, is advantageous. 
The rationale is obvious. The oxygen of these substances 
prevents the liberation of the gaseous hydrogen, which would 
carry off the caloric. Adding to diluted muriatic acid, while 
acting on zinc, enough red lead to prevent effervescence, the 
temperature rose from 70° to 110° Fahrenheit. 
The power of the calorimotor is much increased by having 
the communication between the different sheets formed by 
very large strips or masses of metal. Observing this, I ren- 
dered the sheets of copper shorter by half an inch, for a 
distance of four inches of their edges, where the communica- 
tion was to be made between the zinc sheets; and, vice versa, 
the zinc was made in the same way shorter than the copper 
sheets where these were to communicate with each other. 
The edges of the shortened sheets being defended by strips of 
wood, tin was cast on the intermediate protruding edges of the 
longer ones, so as to embrace a portion of each equal to ore 
one quarter of an inch by four inches. On one side, the tin 
was made to run completely across, connecting at = same 
time ten copper and ten zinc sheets. On the other side there 
was an interstice of above a quarter of an inch left between 
the stratum of tin embracing the copper, and that embracing 
Vol. I.....No. 4, 14 
