A guide to the microscopical examination of drinking water / by J.D. MacDonald.

Date:
1875
Catalogue details

Licence: Public Domain Mark

Credit: A guide to the microscopical examination of drinking water / by J.D. MacDonald. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    Mineral Matter. 1. Carbonate of lime/ finely divided with vesicles of atmo- spheric air, between the glass slip and cover. 2. Also carbonate of lime, but with the evolution of carbonic acid gas b.y the addition of an acid. 3. Fine green mineral particles, cohering as a microscopic breccia, or conglomerate, are here and there mingled with larger and probably more recent sandy granules, preserving their angularity and roughness from fracture ; taken from the debris of a well-sinking, at the Royal Victoria Hospital, Netley. 4. Silicious or flinty granules taken from road-side stream- lets, («) more recent, and ih) of earlier date, having been rounded ofi and smoothed by rolling and attrition, like microscopic boulders.