Some interesting information as to the way in which the human system
is affected under the peculiar conditions of work in mines has been
furnished by M. Fabre, from experiences connected with the coal mines
of France. He finds that the deprivation of solar light causes a
diminution in the pigment of the skin, and absence of sunburning, but
there is no globular anæmia--that is, diminution in the number of
globules in the blood. Internal maladies seem to be more rare. While
there is no essential anæmia in the miners, the blood globules are
often found smaller and paler than in normal conditions of life, this
being due to respiration of noxious gases, especially where
ventilation is difficult. The men who breathe too much the gases
liberated on explosion of powder or dynamite suffer more than other
miners from affections of the larynx, the bronchia, and the stomach.
Ventilation sometimes works injury by its cooling effect.
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SYNTHETIC EXPERIMENTS ON THE ARTIFICIAL REPRODUCTION OF
METEORITES.
By means of igneous fusion the authors have succeeded in reproducing
two types of crystalline associations, which, in their mineralogical
composition and the principal features of their structure, are
analogous, if not identical with certain oligosideric meteorites. The
only notable difference results from the habitual brecchoid state of
the meteorites, which contrasts with state of quiet solidification of
the artificial compounds.--_F. Fouqué and Michel Lévy._
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A catalogue, containing brief notices of many important scientific
papers heretofore published in the SUPPLEMENT, may be had
gratis at this office.
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