es clear and facile to my apprehension. My application was at
first fluctuating and uncertain; it gained strength as I proceeded and
soon became so ardent and eager that the stars often disappeared in the
light of morning whilst I was yet engaged in my laboratory.

As I applied so closely, it may be easily conceived that my progress
was rapid. My ardour was indeed the astonishment of the students, and
my proficiency that of the masters. Professor Krempe often asked me,
with a sly smile, how Cornelius Agrippa went on, whilst M. Waldman
expressed the most heartfelt exultation in my progress. Two years
passed in this manner, during which I paid no visit to Geneva, but was
engaged, heart and soul, in the pursuit of some discoveries which I
hoped to make. None but those who have experienced them can conceive
of the enticements of science. In other studies you go as far as
others have gone before you, and there is nothing more to know; but in
a scientific pursuit there is continual food for discovery and wonder.
A mind of moderate capacity which closely pursues one study must
infallibly arrive at great proficiency in that study; and I, who
continually sought the attainment of one object of pursuit and was
solely wrapped up in this, improved so rapidly that at the end of two
years I made some discoveries in the improvement of some chemical
instruments, which procured me great esteem and admiration at the
university. When I had arrived at this point and had become as well
acquainted with the theory and practice of natural philosophy as
depended on the lessons of any of the professors at Ingolstadt, my
residence there being no longer conducive to my improvements, I thought
of returning to my friends and my native town, when an incident
happened that protracted my stay.

One of the phenomena which had peculiarly attracted my attention was
the structure of the human frame, and, indeed, any animal endued with
life. Whence, I often asked myself, did the principle of life proceed?
It was a bold question, and one which has ever been considered as a
mystery; yet with how many things are we upon the brink of becoming
acquainted, if cowardice or carelessness did not restrain our
inquiries. I revolved these circumstances in my mind and determined
thenceforth to apply myself more particularly to those branches of
natural philosophy which relate to physiology. Unless I had been
animated by an almost supernatural enthusiasm, my ap