Micro-Organisms in Water; Their Significance, Identification and Removal, Together with an Account of the Bacteriological Methods Employed in Their Investigaion, Specially Designed for the Use of Those Connected with the Sanitary Aspects

Micro-Organisms in Water; Their Significance, Identification and Removal, Together with an Account of the Bacteriological Methods Employed in Their Investigaion, Specially Designed for the Use of Those Connected with the Sanitary Aspects

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1894 edition. Excerpt: ...in the case of sterilised sea-water, it was found to have become on the twentieth day already so attenuated, that on inoculating animals in the usual manner with some of the water their death only took place after a lapse of twenty-one days from the date of inoculation, and unaccompanied by any typical tetanic symptoms excepting extreme emaciation. It will be seen from a careful study of the numerous investigations which have been made on the behaviour of pathogenic organisms in water what enormous differences exist in their capacity for living in this medium; that whereas some varieties are destroyed in a few hours, some will live and flourish for many months. Moreover, it is obvious how greatly in some cases the character of the water influences the vitality of the micro-organisms, a point which is especially brought out in Trenkmann's experiments on the cholera bacillus; and it is of particular interest to note how in the case of unsterilised waters the ordinary water bacteria are able to overwhelm and suppress those foreign pathogenic forms which have been introduced. Kraus's experiments are particularly instructive in this respect, for they exhibit the multiplication which takes place in the ordinary water bacteria, and the simultaneous disappearance which ensues of the pathogenic organisms introduced. The experiments on anthrax demonstrate conclusively the immensely greater vital powers possessed by the spore over the bacillar form when introduced into water, aud the necessity of differentiating between these two forms in carrying out such researches. Moreover, it cannot be too rigidly insisted upon that every precaution must be taken to avoid the introduction with the organism of any appreciable quantity of culture-material into the...show more

Product details

  • Paperback | 174 pages
  • 189 x 246 x 9mm | 322g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236654366
  • 9781236654366