204 Tr ansae tions . — Miscellaneous . 



iron did not take more than xoioo ^^ ^ second for the 

 rearrangement of the molecules into their final position ; so 

 that there is no appreciable time-elfect in the demagnetization 

 of finely-laminated iron. 



2. In solid iron cores the induction decays very slowly 

 compared with non-magnetic metals. 



3. In iron and steel the decay is very rapid at first, and 

 then very gradual. 



4. The rate of decay of induction is more rapid in a short 

 cylinder of iron than in a ring of the same dimensions, and is 

 more rapid for steel than for soft iron of the same diameter. 



5. The decay of induction in iron is purely due to the 

 reaction-effect of induced currents in the mass of the metal, 

 and is in no way due to any true time-effect in molecular re- 

 arrangement. 



