Observations on the natural history, climate, and diseases of Madeira during a period of eighteen years / By William Gourlay.
- Gourlay, William
- Date:
- 1811
Licence: Public Domain Mark
Credit: Observations on the natural history, climate, and diseases of Madeira during a period of eighteen years / By William Gourlay. Source: Wellcome Collection.
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![Experiment II. The other spring deposits a bluish sediment. In taste it possesses an acescent pungency, which on agitation dissipates to insipidity. ‘The tincture of galls does not produce in it any sensible alteration; lime water produces a muddy precipitate. Experiment LI]. No.2. Ahotspring. The water here boils, and emits a strongly penetrating sulphureous and ferruginous smell. With tincture of galls it becomes black; with lime water it gives a cloudy precipitate which falls to the bottom ; -and with a small portion of infusion of rhadish it gives a bright red colour. Experiment IY. No. 4. Another boiling hot spring. ‘The water here deposits a blue sediment. Its taste is slightly pungent and austere; it becomes muddy with lime water, and eflervesces with nitrous acid. Experiment V. A cold spring. The water here deposits an ochry sediment, has an acescent ferruginous](https://iiif.wellcomecollection.org/image/b33289402_0161.jp2/full/800%2C/0/default.jpg)
