e., petroleum and coal) contains a number
of hydrocarbons common to both, I am inclined to think that the
balance of evidence is in favor of the hypothesis that petroleum has
been produced in nature from a vegetable source in the interior of the
globe. Of course, there can be no practical or direct evidence as to
the origin of petroleum; therefore "theories are the only lights with
which we can penetrate the obscurity of the unknown, and they are to
be valued just as far as they illuminate our path."
In conclusion, I think that there is a connecting link between the old
pine and fir forest of bygone ages and the origin of petroleum in
nature.--_Chemical News._
* * * * *
THE SCHOOL OF PHYSICS AND CHEMISTRY OF PARIS.
Recently we paid a visit to the New Municipal School of Physics and
Chemistry that the city of Paris founded in 1882, and that is now in
operation in the large building of the old Rollin College. This
establishment is one of those that supply a long-felt want of our
time, and we are happy to make it known to our readers.
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