American Red cross textbook on elementary hygiene and home care of the sick / by Jane A. Delano and Isabel McIsaac.

  • Delano, Jane A., 1862-1919.
Date:
1913
Catalogue details

Licence: In copyright

Credit: American Red cross textbook on elementary hygiene and home care of the sick / by Jane A. Delano and Isabel McIsaac. Source: Wellcome Collection.

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    packets. Under favorable conditions fission occurs rapidly (the hay bacillus in thiity minutes), from which may be readily estimated the enormous mul- tiplication which would result should nothing occur to check the reproduction; but as is the case with Fig. 3.—Spirilla of Various Forms. {Williams.) all organisms, mathematical increase never con- tinues without check or hindrance. In the case of bacteria, the organisms, in their activity upon their food substances, produce acids and other materials Fig. 4.—Bacteria showing Flagella. {Williams.) injurious to themselves which check further multi- plication. Lack of proper food or moisture or favorable temperature, and conflict with other organisms are also checks upon growth and mul- tiplication.