ELECTRICITY 159 



cloth either a piece of glass or a stick of sulphur, 

 resin, or sealing-wax. All these substances, when 

 rubbed, will acquire the property of drawing to them- 

 selves very light objects, like small pieces of straw, 

 little bits of paper, or particles of dust. This eve- 

 ning the cat shall teach us more about it, if it will be 

 good' 1 



