National Geographic <br/><br/>
Elementary Electricity 

 - Washington, D.C.  National Geographic Society  1993 
<br/><br/> Color video; 23 minutes.  Elementary Electricity uses Thomas Edison's invention of the incandescent electric light to introduce some basic concepts in electricity.  The video begins with a look at the discoveries of Benjamin Franklin and other early inventors who investigated electricity.  By Edison's time, batteries, electromagnets, telegraphs, and telephones were in use, but the only electric lights that had been developed were too bright to be used indoors. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science