Dr. Hart's Deflagrator and Calorimotor. 337 



sensible beat. During the operation, there appeared a band 

 of intense fire around the buzz, continually emitting sparks 

 with great violence. He afterwards marked the saw, for 

 the teeth, and in a short time cut them out, by the same 

 means. It seemed evident, that the buzz, in effecting the 

 division, never came in actual contact with the plate. Was 

 this fire the electric fluid ? If so, might it not be obtained, 

 in greater quantity, and be made more effective for chem- 

 ical purposes, by some such machine, than in any other 

 way ? 



Art. XIX. — On the relations, existing between the Defla- 

 grator and Calorimotor, and between those instruments and 

 the common Galvanic or f^oltaic Batteries, in a letter to 

 Professor Robert Hare, M. D.from the Editor. 



Yale- College, April A, 1823. 

 Dear Sir, 



Through the medium of this Journal, (Vol. 4. pa. 201, 

 and Vol. 5, pa. 102,) I have already communicated to you 

 and to the public, the singular fact, that your Deflagrator 

 will not act with the common Galvanic Batteries, in whatev- 

 er mode they may be connected, and that, although belong- 

 ing to the same class of instruments and evolving the same 

 imponderable agents, there still exists between them a total 

 incompatibility. This incompatibility, it will be remember- 

 ed, does not begin to be overcome, until the pairs of galvan- 

 ic plates are reduced to twenty, in number, when the pow- 

 er of the Deflagrator begins to pass, and increases until one 

 pair only is interposed, when it passes apparently without 

 diminution. 



1 am induced again to call your attention to this fact, for 

 the sake of connecting it, with some observations which I 

 have recently made, upon the relations between the Calori- 

 motor and Deflagrator, and between these instruments, and 

 the common Galvanic Batteries, for it is only by varying 

 our observations and experiments, that we can hope to ar- 

 rive at a just explanation, of the singular phenomena exhib- 

 ited by these instruments. 



Vol VL— No, 2. 43 



