and in connection with a related question, I ventured to differ from
him still more emphatically. It was done out of trust in the
greatness of his character; nor was the trust misplaced. He felt my
public dissent from him; and it pained me afterwards to the quick to
think that I had given him even momentary annoyance. It was,
however, only momentary. His soul was above all littleness and
proof to all egotism. He was the same to me afterwards that he had
been before; the very chance expression which led me to conclude
that he felt my dissent being one of kindness and affection.

It required long subsequent effort to subdue the complications of
magne-crystallic action, and to bring under the dominion of
elementary principles the vast mass of facts which the experiments
of Faraday and Plucker had brought to light. It was proved by
Reich, Edmond Becquerel, and myself, that the condition of
diamagnetic bodies, in virtue of which they were repelled by the
poles of a magnet, was excited in them by those poles; that the
strength of this condition rose and fell with, and was proportional
to, the strength of the acting magnet. It was not then any property
possessed permanently by the bismuth, and which merely required the
development of magnetism to act upon it, that caused the repulsion;
for then the repulsion would have been simply proportional to the
strength of the influencing magnet, whereas experiment proved it to
augment as the square of the strength. The capacity to be repelled
was therefore not inherent in the bismuth, but induced. So far an
identity of action was established between magnetic and diamagnetic
bodies. After this the deportment of magnetic bodies, 'normal' and
'abnormal'; crystalline, amorphous, and compressed, was compared
with that of crystalline, amorphous, and compressed diamagnetic
bodies; and by a series of experiments, executed in the laboratory