TERRESTRIAL MAGNETISM AND 

 THE MARINER'S COMPASS. 



\_Taken from ''''Good Words" 1874 and 1879; an d United 

 Service Institution Lectures, 1878 and 1880.] 



HUMAN in- 

 ventions have 

 generally 

 grown by Evo- 

 lutioji. Of per- 

 haps no other 

 than the Mari- 

 ner's Compass 

 can it be said 



that it came into existence complete in a 

 moment. The person who first having a piece 

 of loadstone or a magnet, so supported as 



