306 ELEMENTARY LESSONS ON [CHAP. v. 



calari discovered that Flames are repelled from the axial 

 line joining the poles of an electromagnet. Faraday 

 showed that all kinds of flames, as well as ascending 

 streams of hot air and of smoke, are acted on by the 

 magnet and tend to move from places where the mag- 

 netic forces are strong to those where they are weaker. 

 Gases (except oxygen and ozone), and hot gases especi- 

 ally, are feebly diamagnetic. But the active repulsion 

 and turning aside of flames may possibly be in part 

 due to an electromagnetic action like that which the 

 magnet exercises on the convection-current of the voltaic 

 arc and on other convection-currents. The electric pro- 

 perties of flame are mentioned in Arts. 7 and 291. 



