Measures for avoidance and extermination of flies, mosquitoes, lice and other vermin / by H. Maxwell-Lefroy.

  • Harold Maxwell-Lefroy
Date:
1916
Catalogue details

Licence: Public Domain Mark

Credit: Measures for avoidance and extermination of flies, mosquitoes, lice and other vermin / by H. Maxwell-Lefroy. Source: Wellcome Collection.

    18/26 page 4
    4. Crude-oil emulsion can be used as a soap fc scrubbing walls, floors, articles of furniture, etc. In tb choice of household soaps, preference might be given 1 those which contain some proportion of mineral o emulsified in the soap. 5. Crude-oil emulsion, if prepared from suitable oi is not inflammable; it is non-poisonous, and it may b retained upon the skin indefinitely. After using it in tb bath, the skin and hair retain sufficient of the oil to det( vermin and to given an odour of paraffin Ordinarily th is a protection, but is not enough where vermin ai abundant. A little crude-oil emulsion should, in that cas be rubbed on the body after the bath, where there is reaso to fear infection through this agency. Flies.—The flies that enter houses and carry disease at generally of two kinds : (1) House-flies. (2) Bloiv-flies or Bluebottles. House-flies breed mainly in stable manure, when tha material is in a moist fermenting condition ; they also bree in other fermenting material, such as excrement mixed wit rubbish, rotting vegetable matter, etc. Blow-flies are nc usually to be found in horse manure or cow dung; the breed chiefly in animal carcases, in meat and in anima tissues generally, both in the fresh and decaying conditions Flies lay their eggs in any situation that may b suitable for the growth and development of their young the list of materials detailed above are well adapted fo this purpose The maggot, hatching out, penetrates th material, disintegrates it and feeds upon it, and, in the cas of the blow-fly maggot particularly, immerses itself almos completely in the semi-liquid material. The maggot-stag needs moist conditions. After feeding for some days, th maggots leave the moist fermenting material for drie conditions; they seek a situation where they can turn int the hard, brown, seed-like, “chrysalides,” within whicl the fly develops. After a lapse of some days the fly emerge
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