They also tested several varieties of nickel-steel in the form of both ovoids and wires.
Bidwell's results for iron and nickel were confirmed, and it was further shown that the elongation of nickel-steel was very greatly diminished by tension; when 2 Joule believed that the volume was unchanged.
Thus it has been proved that in annealed cobalt and in nickel-steel there is no Villari reversal.
Guillaume' the temperature at which the magnetic susceptibility of nickel-steel is recovered is lowered by the presence of chromium; a certain alloy containing chromium was not rendered magnetic even by immersion in liquid air.
In a 29% nickel-steel, magnetization increases the constants by a small amount.
