as some little time
before he could command voice enough to speak, for he was shaking as if
from palsy. At last he said, after he had moistened his lips several
times:--

"Professor, we are quite willing to take your word about the explosive.
I think I speak for all my comrades here. We have no doubt at all about
your learning, and would much prefer to hear from your own lips what
you have to say on the subject, and not have you waste any more
valuable time with experiments. I have not consulted with my comrades
before speaking, but I think I voice the sense of the meeting." Cries
of "You do, you do," came from all parts of the hall. The Professor
once more beamed upon them benevolently.

"Your confidence in me is indeed touching," he said, "but a chemical
lecture without experiments is like a body without a soul. Experiment
is the soul of research. In chemistry we must take nothing for granted.
I have shown you how many popular errors have arisen regarding the
substance with which we are dealing. It would have been impossible for
these errors to have arisen if every man had experimented for himself;
and although I thank you for the mark of confidence you have bestowed
upon me, I cannot bring myself to deprive you of the pleasure which my
experiments will afford you. There is another very common error to the
effect that fire will explode dynamite. Such, gentlemen, is not the
case."

The Professor struck a match on his trousers-leg and lighted the
substance on the anvil. It burnt with a pale bluish flame, and the
Professor gazed around triumphantly at his fellow Anarchists.

While the shuddering audience watched with intense fascination the pale
blue flame the Professor suddenly stooped over and blew it out.
Straightening himself once more he said, "Again I must apologize to
you, for again I have forgotten the small spot of grease. If the flame
had reached the spot of nitro-glycerine it would have exploded, as you
all know. When a man has his thoughts concentrated on one subject he is
apt to forget something else. I shall make no more experiments with
dynamite. Here, John," he said to the trembling attendant, "take this
box away, and move it carefully, for I see that the nitro-glycerine is
oozing out. Put it as tenderly down in the next room as if it were a
box of eggs."

As the box disappeared there was a simultaneous long-drawn sigh of
relief from the audience.

"Now, gentlemen," said the Professor, "we come to