Engineers and Engineering Volume 22

Engineers and Engineering Volume 22

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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. 1905 edition. Excerpt: ...system has been thoroughly overhauled, 225 new post hydrants have been set, and the Office of Water-Supply equipped with modern American tools. The water is far from good in quality and was one of the means of spreading the recent epidemic of Asiatic cholera. The amcebse of dysentery are found in large numbers in the water, as are the germs of typhoid. Efforts are now being made to remove these amcebse and germs by the addition of copper sulphate as a germicide, in the proportion of one part sulphate to 4,000,000 parts water. The experiments thus far conducted have not been productive of direct results, but it is expected that within a few months the complete removal of these organisms will be effected. The street area of the city is approximately 1,500,000 square meters in extent, of which about 95 per cent, is laid in macadam of a very unsatisfactory nature. The difficulties lie in the poor foundations on account of the saturated subsoil, and in the character of the local stone, which has little binding qualities and wears unevenly. Some success has been had with gravel, but only in the less traveled streets. A general thickening of the wearing surface has, however, decreased the destructiveness of the traffic. Concrete curbing on the more important streets and regular sprinkling have aided materially in the preservation of the road surface. Improved pavements have scarcely been considered because of the high cost of materials, but within the last year the city has completed about 10,000 square meters of Australian wood block pavement, which has given satisfaction. Three new openings have been made in the city wall and one gate widened. These improvements have markedly relieved the traffic congestion of the Walled City. During more

Product details

  • Paperback | 140 pages
  • 189 x 246 x 8mm | 263g
  • United States
  • English
  • black & white illustrations
  • 1236853288
  • 9781236853288