Water analysis, as it should, and as it should not, be performed by the Medical Officer of Health. With illustrations / by Cornelius B. Fox.
- Date:
- 1875
Licence: Public Domain Mark
Credit: Water analysis, as it should, and as it should not, be performed by the Medical Officer of Health. With illustrations / by Cornelius B. Fox. 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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![Apparatus. Chemicals. Solid residue. technical details. I will first enumerate the apparatus and chemicals required. Retort holding about 2J litres; Liebig’s condenser; Nessler j glasses (8); hell metal clamps (2); burette, graduated to -/o-ths, and capable of holding 50 c.c., and stand; pipette; adapter; ] retort stand; half litre flask; 70 c.c. flask; 25 c.c. flask; ] scales which will turn with a milligramme, and weights from a milligramme to 20 grammes; Nessler reagent; platinum dish; beaker; Bunsen’s burners, one large and another small; white porcelain tiles, about 5 inches square (2); I Gmelin’s wash bottle; stoppered bottles, each holding about one litre, for collecting waters ; Berlin evaporating dish, 4 inches in diameter; pipette for silver solution, of the capa- city of 5 c.c., and graduated to iijths; ditto for soap solution ; j glass rod; pipe triangle ; dilute standard ammonia solution, permanganate of potash and caustic potash solution, nitrate of silver solution, soap solution (/or Recipes, see Appendix), ' distilled water, sulphuret of ammonium, chromate of potash, hydrochloric acid. It is wise to purchase all the above articles, ] and to oneself prepare the distilled water and the solutions. ! The latter, however, can he bought, if it is wished to avoid the ; trouble of making them. I procured my apparatus and Nessler reagent at Messrs. ] Townson and Mercers, of Bishopsgate Street; my excellent j chemical balance, made by Becker of New York, at the office j of the “ Chemical News,” for £3 13s. 4d.; and the weights j of Oertling. Solids.—If it is the intention to make a complete analysis, j which would necessitate the estimation of the amount of solid residue, commence thus :— Weigh the platinum dish empty, place it over a water j hath, and pour into it 25 c.c. of water to he examined. | Evaporate to dryness. Again weigh dish promptly to avoid | deliquescence of salts.](https://iiif.wellcomecollection.org/image/b21995904_0024.jp2/full/800%2C/0/default.jpg)
