

WAVE SHAPES 



Wave-motions are often complex. The above illustration shows some fairly complicated wave 

 shapes. All such wave-motions can be produced by superposing a number of simple wave 



fonr.s. 



Th, illustration is that of 

 Tte^^^ 



62 inches in diameter, lifts a weight of 40 tons. 



THE POWER OF A MAGNET 



ric magnet lifting scrap from railway trucks. 

 The same type of magnet. 



