172 MR. H. TOMLINSON ON THE INFLUENCE OF STRESS AND STRAIN, ETC. 
31. The “ circular” magnetization which is produced when a current flows through a 
wire of iron does not appreciably alter the electrical resistance of the wire. 
32. The effects of temporary stress and of permanent strain on the alteration by 
magnetism of the resistance of an iron or nickel wire are of a similar nature to those 
on the alteration of the magnetic susceptibility of these metals. 
33. There is a very striking relationship, both as regards amount and direction, 
between the alteration of specific resistance, which can be produced in a substance by 
longitudinal traction and the “ rotational coefficient ” of the substance. 
34. There is evidently an intimate relationship between the “viscosity” of a metal 
and its specific electrical resistance. 
