SUPPLEMENTARY MATERIALS 



263 



Greenwood, Ambers to Amperes: the Story of Elec- 

 tricity (Harper) 



Gibson, How We Harness Electricity (Blackie & Son) 

 Crowther, Osiris and the Atom (Coward-McCann) 

 Anderson, Electricity for the Farm (Macmillan) 

 Adams, Harper's Electricity Book for Boys (Harper) 



Reports which may be prepared 



1. The life and achievements of Luigi Galvani 



2. The life and achievements of Alessandro Volta 



3. The life and achievements of Andre M. Ampere 



4. The life and achievements of George S. Ohm 



5. Joseph Henry and the first electromagnet 



6. Faraday and his discoveries in electricity 



7. Other discoveries of Faraday 



8. The evolution of electric lighting 



9. Edison and the electric light 



10. Davy and the discovery of the electric arc 



11. Benjamin Franklin, the scientist 



12. Electricity on the farm 



13. The making of neon signs 



14. Boulder Dam and the harnessing of the Colo- 

 rado River 



15. New developments in highway lighting 



16. Lightning rods and their use on farm buildings 



Great scientists you should know about 



1. Alessandro Volta 



2. Benjamin Franklin 



3. Luigi Galvani 



4. William Gilbert 



5. Joseph Henry 



6. Michael Faraday 



7. Hans C. Oersted 



8. Thomas A. Edison 



9. George S. Ohm 

 10. Andre M. Ampere 



Investigations and things to do 



1. Make a compass from a piece of steel and a cork. 



2. Make a model of Volta's first "electric pile." 



3. Make an electroscope. 



4. Make an electric buzzer. 



5. Make a small galvanometer. 



6. Set up and test several types of electric cells 

 such as the Daniell cell, the bichromate cell, 

 the gravity cell. 



7. Make working models of two types of water 

 wheels. 



8. Set up a miniature power plant with lights, 

 bells, motors, etc. 



9. Build a small electric motor. 



10. Make a push button. 



11. Set up a cell and electroplate with copper. 



12. Make a magnet out of a hack saw blade. 



13. Make a standard compass from a hack saw 

 blade. 



14. Learn how to make electrotypes. 



15. Make an electric lamp. 



