Hints to househunters and householders / by Ernest Turner.

  • Turner, Ernest.
Date:
1884
Catalogue details

Licence: Public Domain Mark

Credit: Hints to househunters and householders / by Ernest Turner. Source: Wellcome Collection.

    73/210 (page 51)
    Filtration is a very delicate subject. The major- ity of filters are pure delusions. Some are useful for a time as strainers, but have no other action ; and almost all are apt to get rapidly out of order, and to pollute the water instead of purifying it. Charcoal, especially, so much vaunted as a filter- ing medium, requires frequent renewal. The Rivers Pollution Commission reported of one highly-ap- proved house-filter that “ myriads of minute worms were developed in the animal charcoal, and passed out with the water when the filters were used for Thames water, and the charcoal not renewed at sufficiently short intervals.” The filtering medium, whatever it may happen to be, should always be readily accessible, and should be thoroughly cleansed at least once every six months. UNFILTERED WATER Fig. 1. Without pretending to decide too dogmatically on this delicate point, I may say that the filter E 2