340 Dr. Hare's Dejlagrator and Calorimotor. 



but without deriving any increase of power from them or from 

 the Calorimotor ; the Calorimotor then is an intermedium 

 for the troughs and the deflagrator otherwise incompatible. 



5. It is impossible as far as experiment has gone, to 

 obtain any increase of power by combining the different 

 kinds of voltaic apparatus, and indeed it may be doubted 

 whether, when the power passes at all, through the instru- 

 ments of different kinds, there is not always some loss, from 

 the increased extent of connecting surface. 



6. These various facts are probably all referable to the 

 different powers, belonging to different proportions of the 

 calorific, electrical, and luminous influence, excited by these 

 different instruments, agreeably to the theory, which you 

 have ingeniously proposed and ably defended ; this view 

 accords also with the known results of the combinations of 

 ponderable elements, in different proportions, as of nitro- 

 gen and oxigen, and of carbon and oxigen, and of carbon 

 hidrogen, and nitrogen. 



7. We are thus sent back, to study our imponderable el- 

 ements anew, and to learn, that the voltaic power is not 

 electricity alone, nor heat alone,' nor light alone, but a com- 

 pound of these three agents, variously proportioned in dif- 

 ferent cases, and in different modifications of apparatus. 

 This, it appears, is also true, of the common mechanical 

 and atmospheric electricity. 



Remark. 



As the magnetic influence attends all the modifications of 

 electricity, natural and artificial, and of the voltaic power, 

 including your new instruments; and as it is exhibited also 

 by the solar beam, we are left in doubt, whether to regard 

 it as a mere appendage of these powers, or of some one or 

 two of them, or as a distinct influence or energy, incidental- 

 ly associated, with the colorific — calorific and electrical 

 powers. 



But, as the magnetic influence is marvellously more pow- 

 erful, in the Calorimotor, than in the case of any voltaic, 

 electrical or optical instrument, and as the Calorimotor 

 evolves chiefly heat, and produces its magnetic effects hest 

 when it produces no light and no perceptible electricity, it 

 would seem^ as if the magnetic influence were rather an at- 



