--_Photo. News._
* * * * *
DANGERS OF PYROGALLIC ACID.
By DR. T.L. PHIPSON.
Some time ago, Dr. Napias, of Paris, who devotes much of his time to
matters connected with hygiene, took up the subject of the hygiene of
the photographer, and published in the _Moniteur de la Photographie_ a
series of papers which were afterward translated into English and
published by Messrs. Piper & Carter, of London. In them the worthy
author has considered the action on the economy of the various
poisonous substances which pass daily through the hands of our
readers, and the best means of counteracting their influence.
Since then--in fact, quite recently--attention has been called in the
medical journals to certain properties of pyrogallic acid which were
perfectly unknown, and show that this substance, even when applied
externally, may act as a violent poison causing death by its great
affinity for oxygen. I published a short note upon the subject in the
_Journal of Medicine_, etc., for April last, and it may perhaps be
useful to reproduce the facts here. Physicians who were unacquainted
with this energetic deoxidizing property of pyrogallic acid have
proposed it as a substitute for chrysophanic acid in the treatment of
skin diseases; but Dr.
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