Fig. 2. 



ELECTRO-MOTIVE POWER. 



CHAPTER I. 



1. Prospects of improvement in motive power by the application of 

 electricity. 2. Example of its practical application in the workshop 

 of Mons. Froment, mathematical instrument maker in Paris. 3. 

 Mention of it in Catalogue of the Great Exhibition in Hyde Park. 

 4. Property of electro-magnets. 5. Alternate transmission and 

 suspension of the current. 6. How this produces a moving power. 

 7. Voltaic piles used by Mons. Froment. 8. Forms of his electro- 



LARDNER'S MUSEUM OP SCIENCE. o 193 



No. 124. 



