AND STRAIN ON THE ACTION OF PHYSICAL FORCES. 
Ill 
The tables also show a curve representing the restitution of torsional rigidity in 
German-silver after hammering, the abscissae representing the increase of rigidity on 
a scale of '0085 per cent, to 1 millim. and the ordinates on the same scale as for the 
other curves. 
Table XIX. — Curves showing the recovery of electrical conductivity and of torsional 
rigidity produced by time in the case of wires which have been hammered transversely. 
This table shows the marked difference between German-silver and platinum-silver 
in respect to the restitution of conductivity produced by rest on these metals when in 
a state of strain, and this large difference is not confined to strain produced by 
hammering, but was found to exist also in strain produced by extension, torsion, and 
wire-drawing, and when taken in combination with the results given in Tables XV., 
