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INDOOR RECREATION 



running of their railway system, and with their friends 

 pass many happy hours u running a railroad." 



Homemade electricity. A great deal of fun may be 

 had from a little further knowledge of electricity which 

 can be made in the home. You have sometimes produced 

 an electric spark when you " scuffed " your feet over the 

 carpet in winter or rubbed the cat's 

 fur the wrong way, or had your hair 

 stand up in an astonishing manner 

 when you brushed it. These are all 

 caused by electricity. Many interest- 

 ing things can be done at home with 

 this electricity if the air is cold and 

 dry. If a hard rubber fountain pen or 

 a rubber comb is rubbed briskly with 

 flannel it will attract small bits of 

 An electrified rod repels the paper or a pith ball supported by a 

 thread. If the ball or the bits of paper 

 become electrified, as they sometimes will after clinging to 

 the rubber for a moment, they will be repelled and fly 

 away from it. 



Experiment. To demonstrate static electricity. 



Materials: Hard rubber rod or stick of sealing wax. Two large rods of 

 solid glass. Fur. Flannel. Silk. Pith ball. 



Method and Results: Electrify the glass (previously warmed a little) by 

 nibbing with silk. Support this on a wire stirrup supported by a 

 thread. Electrify the other glass rod. Bring the charged ends near 

 each other. Result? Rub the hard rubber with fur. Bring the charged 

 end near the charged end of the suspended glass rod. Result ? Hang a 

 pith ball by a thread. Hold an electrified glass on one side of it and an 

 electrified rod of hard rubber on the opposite. Result ? Glass rubbed 

 with silk is positively electrified. Rubber or wax rubbed with flannel 

 or fur is negatively electrified. 



Conclusion: What is the action between electrified bodies? When 



