Chemical Abstracts Volume 14, Nos. 1-10

Chemical Abstracts Volume 14, Nos. 1-10

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 edition. Excerpt: ...higher alkalinity than Ph = 8.1, that is, nearly all surface waters, will gain COi from the air. Using artificial sea water with carbonates to make PH--8.2 and on satg. with air the value of Ph was reduced to 7.9 or 8.1. By measuring neutral sea waters containing known amts. of alkali and Hjcoi, it is seen that Ph = 8.1 in salt water corresponds with a ratio of about 1.08; any sea water containing lessthan2.2/i.o8 = 2.04 millimols. of Hjcoj to 2.2 milli-equivalents of alkali should gain COj from the air. From direct exptl. results it is found that in a water of total alkalinity equal to 2.2 milli-equivalents the lowest ratio and the highest acidity that is normally encountered in sea water is in equil. with atmospheric COi, and that in all other cases the water will gain COj. Other means of maintaining alkalinity and varying the amts. of COj are taken up by the consideration of geochem. and biochem. factors. B. Fsubr Water-supply typhoid outbreak at Lansing, Michigan. J. R. Daugherty. Eng. News-Record 84, 92-4(1920).--The water supply of Lansing is obtained from 32 artesian wells, 350 to 400 ft. deep. At the time of high water in Grand River, March, 1919, the wells were polluted through leaky joints by sewage forced into the soil. Over 3000 cases of dysentery and 82 cases of typhoid occurred followed by n deaths. Chlorination of the supply was temporarily adopted. Frank Bachmann Rating of state control of public water supplies. Anon. Eng. News-Record 84, 44(1920).--Ratings of every State ranging from 970 for Ohio and Mich, to 10 for Mo. out of a possible 1000 are tabulated. The ratings, made by the U. S. Public Health Service in 1919, are as follows: 7 States "excellent," 8 good, 15 fair, 8 poor, and 9 very poor. Frank Bachmann...show more

Product details

  • Paperback | 984 pages
  • 189 x 246 x 49mm | 1,719g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236985974
  • 9781236985972