•1<U V 1< RECAPITULATION. 



3. Galvanic electricity is produced by the che- 

 mical action of bodies upon each other. 



4. The oxydation of metals appears to produce 

 it in great quantities. Electricity produced by 

 this means appears to be in a state of less condens- 

 ation, than when it is produced by friction, as in 

 an electrical machine. 



5. Galvanic electricity can be made to set on 

 fire inflammable substances, oxydate metals, and 

 charge a Leyden phial, nearly in the same manner 

 as common electricity. 



6. The nerves of animals appear to be most 

 easily affected by it, of any known substances. 



7- Galvanic electricity is conducted, and re- 

 fused a passage, by the same substances as com- 

 mon electricity. 



8. When it is made to pass through an animal, 

 it produces a sensation resembling the electrical 

 shock. 



9- The electricity produced by animals, as the 

 torpedo and electrical eel, are analogous to gal- 

 vanism. 



ABSTRACT OF MAGNETISM. 



1. The cause of magnetism is totally unknown; 

 some have attributed it to a peculiar fluid, which 

 they have called the magnetic fluid. 



2. Iron is the only known body that is capable 

 of being possessed of magnetism. 



3. Every magnet has two opposite points, which 

 are called poles. 



4. When a magnet is left at liberty to move 

 freely, it places itself so that these poles point 

 nearly north and south. This is called the direc- 

 tive property, or polarity of the magnet. 



