PROFESSOR THOMSON ON THE ELECTRO-DYNAMIC QUALITIES OF METALS. 729 
of unequal heating of the junctions of mercury and nickel, and of the junctions of 
mercury and copper, was set beyond all doubt. I therefore conclude, that longitudi- 
nally magnetized nichel in a thermo-electric circuit deviates from niehel not under mag- 
netizing force, in the same direction as bismuth. This is the reverse of the deviation 
which I formerly found to be produced in iron by longitudinal magnetization. 
144. The results of the various experiments which have been described in Part III. 
are collected in the following Tables. 
Table I. — Effects of Stresses and Strains on the Thermo-electric Qualities of Metals. 
Description of 
Conductor. 
Thermo-electric Order reckoned from Bismuth towards Antimony. 
Iron 
Under longitudinal traction. 
1 
Iron 
Under transverse compression. 
Tinder transverse traetion 
Under longitudinal traction. 
Iron 
Permanently strained by longitudinal 
traction, and left free from stress. 
Soft 
Permanently strained by longitudinal 
compression, or by lateral extension, 
and left free from stress. 
Iron 
Hardened by transverse hammering ... 
Soft 
Hardened by longitudinal hammering. 
Round iron wires of 
different diameters. 
Made brittle by twisting 
Annealed after being made 
brittle by twisting. 
Round and flattened 
iron wires. 
Suddenly cooled 
Annealed. 
Steel wire 
Some specimens flattened by trans- 
verse hammering. 
Soft 
Other specimens flattened by trans- 
verse hammering. 
Round and flattened 
steel wires. 
Hardened by sudden cooling 
Annealed. 
Steel watch-spring .. 
Hardened by sudden cooling 
Annealed. 
Copper 
Under longitudinal traction 
Free. 
Soft 
Permanently elongated by longitudinal 
traction, and left free from stress. 
Hammered transversely. 
Round copper wire .. 
Annealed after being made 
brittle by twisting. 
Made brittle by twisting. 
Round copper wire .. 
Annealed 
Suddenly cooled. 
Platinum 
Under longitudinal traction 
Free. 
Platinum 
Soft 
Hammered transversely. 
Tin 
Permanently elongated by longitudinal 
traction, and left free from stress. 
Tin 
Hammered transversely. 
Brass 
Hammered transversely. 
Round brass wire 
Suddenly cooled. 
Cadmium 
Hammered transversely. 
Lead 
Soft 
Hammered transversely. | 
Zinc 
Hammered transversely. 
