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for there was a certain dignity in his mien during his lecture which in
his own house was replaced by the greatest affability and kindness. I
gave him pretty nearly the same account of my former pursuits as I had
given to his fellow professor. He heard with attention the little
narration concerning my studies and smiled at the names of Cornelius
Agrippa and Paracelsus, but without the contempt that M. Krempe had
exhibited. He said that "These were men to whose indefatigable zeal
modern philosophers were indebted for most of the foundations of their
knowledge. They had left to us, as an easier task, to give new names
and arrange in connected classifications the facts which they in a
great degree had been the instruments of bringing to light. The
labours of men of genius, however erroneously directed, scarcely ever
fail in ultimately turning to the solid advantage of mankind." I
listened to his statement, which was delivered without any presumption
or affectation, and then added that his lecture had removed my
prejudices against modern chemists; I expressed myself in measured
terms, with the modesty and deference due from a youth to his
instructor, without letting escape (inexperience in life would have
made me ashamed) any of the enthusiasm which stimulated my intended
labours. I requested his advice concerning the books I ought to
procure.

"I am happy," said M. Waldman, "to have gained a disciple; and if your
application equals your ability, I have no doubt of your success.
Chemistry is that branch of natural philosophy in which the greatest
improvements have been and may be made; it is on that account that I
have made it my peculiar study; but at the same time, I have not
neglected the other branches of science. A man would make but a very
sorry chemist if he attended to that department of human knowledge
alone. If your wish is to become really a man of science and not
merely a petty experimentalist, I should advise you to apply to every
branch of natural philosophy, including mathematics." He then took me
into his laboratory and explained to me the uses of his various
machines, instructing me as to what I ought to procure and promising me
the use of his own when I should have advanced far enough in the
science not to derange their mechanism. He also gave me the list of
books which I had requested, and I took my leave.

Thus ended a day memorable to me; it decided my future destiny.


Chapter 4

From this day natural philosophy, and particularly chemistry, in the
most comprehensive sense of the term, became nearly my sole
occupation. I read with ardour those works, so full of genius and
discrimination, which modern inquirers have written on these subjects.
I attended the lectures and cultivated the acquaintance of the men of
science of the university, and I found even in M. Krempe a great deal
of sound sense and real information, combined, it is true, with a

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