CHAP, v.j ELECTRICITY AND MAGNETISM. 301 



Fig. 127. 



The following are the principal substances examined 

 by the method : 



Paramagnetic. 



Iron. 



Nickel. 



Cobalt. 



Manganese. 



Chromium. 



Cerium. 



Titanium. 



Platinum. 1 



Many ores and salts 

 containing the 

 above metals. 



Oxygen gas. 



Diamagnetic. 



Bismuth. 



Phosphorus. 



Antimony. 



Zinc. 



Mercury. 



Lead. 



Silver. 



Copper. 



Gold. 



Water. 



Alcohol. 



Tellurium. 



Selenium. 



Sulphur. 



Thallium. 



Hydrogen gas. 



Air. 



1 Chemically pure Platinum is diamagnetic, according to Wiedemann 



