DOUBLE POWEK OF THE MAGNET. 117 



site extremity (N) you see that it is the coloured 

 end of the needle which is. pulled towards it. 

 We are now therefore dealing with two kinds of 

 power, attracting different ends of the magnet 

 a double power, already existing in these 

 bodies, which takes up the form of attraction 

 and repulsion. And now when I put up this 

 label with the word MAGNETISM, you will under- 

 stand that it is to express this double power. 



Now with this loadstone you may make mag- 

 nets artificially. Here is an artificial magnet 

 (fig. 39) in which both ends have been brought 



Fig. 39. 



together in order to increase the attraction. 

 This mass will lift that lump of iron, and what 

 is more, by placing this keeper, as it is called, 



I 3 



