Note 391 — PHARMACOLOGIA. (continued 2)

There is a precaution respecting the preservation of these waters for analysis with which the chemist ought to be acquainted; it will be fully explained by the relation of the following anecdote. M. Wurza, on examining some bottles of Chalybeate water, could detect no signs of iron in them, and on seeking for the cause of this circumstance, he discovered it in the astringent nature of the corks which had combined with the metallic substance, and abstracted it from the water.