Our secret friends and foes / by Percy Faraday Frankland.

  • Percy F. Frankland
Date:
1899
Catalogue details

Licence: Public Domain Mark

Credit: Our secret friends and foes / by Percy Faraday Frankland. Source: Wellcome Collection.

    25/284 (page 21)
    colours we have in the first instance to prepare these fibres by impregnating them with what are known as mordants. Now this is essentially the principle on which it has been found possible to demonstrate in the most beautiful way the existence of these organs of locomotion, or Flagella as they are called (see Fig. 5). Fig. 5.—Bacilli of Typhoid Fever, showing the Flagella or organs of locomotion. (After Migula.) In the accompanying figure a bacillus is seen, from the walls of which most peculiar wavy threads start out in all directions. These are the Flagella, and in some varieties extend, as in this case, in considerable numbers from all parts of the body. In some instances they give rise to a bushy appear- ance either at one or both ends of the microbe, whilst they are also found single or in pairs (rarely in threes) at either pole. The above drawing is taken from a preparation of the bacillus of typhoid