The examination of water supplies / by John C. Thresh.

  • Thresh, John C. (John Clough), 1850-1932.
Date:
1904
Catalogue details

Licence: In copyright

Credit: The examination of water supplies / by John C. Thresh. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

    476/500 (page 456)
    Physical examination of waters, 182 interpretation of results of, Pinnularia, figure of, 384, 412 Pleurococcus, figure of, 382, 386, 388 decaying, cause of odour of water, 386 Pleuromonas jaculans, significance of, 123 Pleurosigma, figure of, 400 Plumbo-solvency, see Lead PneumonioB, bacillus, action of, on bile salt glucose broth, 341 Poisoning by lead, symptoms of, 87 Pollution, intermittent, danger of, 1 ; examples of, 19, 28 See Elvers, Springs, Wells, &c. evidence of past, 70, 133 Polytoma Uvella, significance of, 128 Ponds, examination of, 37, 114 samples from, 172 Porosity of subsoil, effect on wells, 14 Post-tertiary sands and gravels, 4 Potassium, estimation of, 242 gravimetric analysis of, in Buxton thermal waters, 265 • rarity in water of chloride of, 68 Primmg pumps, objection to, 16 Prior and Finkler's vibrio proteus, 168 Prodigiosus, bacillus, use of, in detecting sources of pollution, 24 action of, on bile salt glucose broth, 341 Protection of springs, 29; of shallow wells, 15 ; of reservoirs, 37 Proteus, sewage, 344 Proteus, vibrio, 168 Proteus vulgaris, action on bile salt glu- cose broth, 341 Protomyxa, figure of, 406 Protozoa, a cause of odour of water, 118 figure of, 382 et seq. Pseudo-diphtherise, bacillus, production of H.,S by, 169 Psittacosis, bacillus, 144 Pumps, defective, 16, 17 objection to priming of, 16 samples of water from, 172 Purification of rivers, 41; examination of, 52, 289 Purifying action of subsoil- experimental study of, 28 examples of, 17, 28, 71 Putrefactive bacteria, a cause of odours of water, 62 Eadiolabian, figure of, 396 Badium in water, 438 Eafter-Sedgwick's method of examining suspended matters, 376 Eain, effect upon surface water supplies of, 25, 34 effect upon number of bacteria of I 34, 138 j a cause of turbidity, 18, 28, 30, 00 j effect upon plum bo-solvent power j of moorland waters of, 36 I causing pollution of service re servoirs, 46; of shallow wells. 71 Eainwaters, taste of, 64; nitrates in, , 74; chlorides in, 68; acidity of some, i 86 ; free ammonia in, 89 Eainwater supplies, inspection of, 38 Eainwater separator, 39 Eayleigh, Lord, on helium in water. 439 Eeaction of waters— method of determining, 185 ' importance of determining, 66 See also Acidity, Alkaline Beading beds, 5; analysis of water from, 305 Eeagents, formulae of, 427 I Bed, neutral, see Neutral red I Bed Sandstone, New, 10; water from, 308 Old, 11 Beservoirs, collection of samples from, 172, 177 should be covered, 46, 122, 388 ; storage, examination of, 37, 44 ' need for, 41, 44 service, 46 Besidue after evaporation, 66, 235 Eesults of chemical analysis, tabulation of, 309 correction of, 276 of bacteriological analysis, expres- sion of, 358 Bhizopoda, figure of, 384 et seq. Eichardson, Sir B. W., on use of hard waters, 81 Bickets and use of soft water, 81 Bivers, examination of, 40 smell of waters from, 62 number of bacteria in waters from, 137 relative proportion of dissolved oxygen and nitrogen in, 289 results of analyses of various, 306 purification of, 41; examination of, 52,289 Bivers Pollution Commissioners on London sewage, 74 Bivularia, a cause of odour of water, 118; figure of, 412 Eothberger on neutral red, 347 Eotiferse, figure of, 382, 384, 398, 400, 412