A manual of practical hygiene / by Edmund A. Parkes ; edited by F.S.B. Francois de Chaumont.

Date:
1878
Catalogue details

Licence: Public Domain Mark

Credit: A manual of practical hygiene / by Edmund A. Parkes ; edited by F.S.B. Francois de Chaumont. 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.

    131/820 (page 89)
    CHEMICAL ANALYSIS. Qualitative. Lime Ammonia Magnesia Nitric acid Chlorine Nitrous acid ... Sulphuric acid Organic matter Phosphoric acid Iron. Lead or copper Zinc. Hardness. Total ) Degrees .1° pi milli- grammes per litre. Fixed > of Temporary or Eemovahle J Clark's scale. Quantitative. grains per gallon. Volatile matter [by incineration and after recarbonating] .., r Oxygen required for organic matter Ammonia, free Do., albuminoid - Nitric acid Nitrous acid Chlorine Sodium (combined with do.) Calcium carbonate Fixed hard salts (estimated as calcium carbonate) ^Sulphuric acid * Alkaline carbonates, &c *Silica, Alumina, &c Total solids by evaporation Microscopic characters and remarks. Examination of Water suspected to be contaminated with the discharges from Cholera or Typhoid Patients, or with Marsh Water. The examination of water contaminated with cholera discharges is a most difficult process If choleraic stools are added in some quantity the water becomes distinctly hazy and in places where cholera prevails anything like decided haze should lead to the disuse of the water. If, however, the choleraic S?hSmBmf-am°^ ^ tmn6^J of ^ ^terinay be unchanged^ ZlZm T ?\that n0 Cliemical test would detect what mlhi be a sufficient amount of cholera poison to cause the disease. Fortunately we lZ cZz:s:^eif ;alr Ma—t ^ stated si: TOiStT oSTp w t , ^ dlscharSes vibriones appear with great So vth7' rt« l VS dmSrnS durin§ ^ period of active vibrional Stended to thP IT T' hj * Careful obs™> should certainly be rejected. Pasteur's fint\ ,Z j'i T hey are Present sllould be at onco vibnona stlg 7uS^dbTfh 8 ^ T additio»al ^ Wh,n the according to kSa^^S^,^ *»* ^ la the case of the discharges of enteric fever entering water, the amount of u^leTSt be™ determined in detail, they can be grouped together t On Asiatic Cholera, 1870, pp. 330 and 397.