Architectural Hygiene; Or, Sanitary Science as Applied to Buildings. a Text-Book for Architects, Surveyors, Engineers, Medical Officers of Health, Sanitary Inspectors, and Students

Architectural Hygiene; Or, Sanitary Science as Applied to Buildings. a Text-Book for Architects, Surveyors, Engineers, Medical Officers of Health, Sanitary Inspectors, and Students

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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. 1911 edition. Excerpt: ... health is a much debated point, but from an economic point of.view, soft water is much preferable, and it is said that in Glasgow, since the soft water supply from Loch Katrine was introduced, a saving of over 30,000 in soap has been effected per annum. Hard water also causes lime deposits in boilers, kettles, and hot-water pipes; it is unpleasant for domestic use as it produces roughness of the skin. Dyspepsia, gravel and stone in the bladder, and swellings of the glands have also been attributed to its use. The late Sir Douglas'Galton suggested that 10 deg. of hardness would satisfy the general requirements of a town supply. Dr. Clark's process for removing temporary hardness consists in the addition of lime, by which means the bicarbonate of lime in the water is reduced to a carbonate, which latter is precipitated. At Luton Hoo the hardness of the water is reduced from 18% deg. to 4 deg. by this process, and 70,000 gallons can be softened per diem. at Canterbury from 17% deg. to 3 deg. and 680,000 gallons per day are supplied. Permanent hardness of water at Penarth is reduced from 18 deg. to 6 deg. by the addition of 22'5'lb. of lime, 5 lb. of soda, and r lb. of alum to every 10,000 gallons of water. Clark's process consists in the addition of I oz. of quicklime to every 100 gallons. The Porter-Clark system is a modifi_cents cation of this, the precipitated calcic carbonate being removed by cloth filtration under pressure, thus avoiding the 'delay of slow subsidence. _We have frequently' used, the Boby apparatus for softening water and have found it successful if great care is used in adapting it to existing circumstances. We have reduced water from over I20 deg. of hardness down to 16 deg. by thishow more

Product details

  • Paperback | 70 pages
  • 189 x 246 x 4mm | 141g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 123682024X
  • 9781236820242