420 FRAGMENTS OF SCIENCE. 



magnet. Such induced currents would, according to known laws, 

 have a direction opposed to those of the inducing magnet, and hence 

 would produce the phenomena of repulsion. To carry out the 

 assumption here made, M. Weber is obliged to suppose that the 

 molecules of diamagnetic bodies are surrounded by channels, in 

 which the induced molecular currents, once excited, continue to 

 flow without resistance.' ' Diamagnetism and Magne-crystallic 

 Action, p. 136-7. 



1 In assuming these non-resisting channels M. Weber, it must be 

 admitted, did not go beyond the assumptions of Ampere. 



