Our secret friends and foes : expanded from lectures delivered before popular audiences in London, Edinburgh, and elsewhere / Percy Faraday Frankland.

  • Percy F. Frankland
Date:
1893
Catalogue details

Licence: Public Domain Mark

Credit: Our secret friends and foes : expanded from lectures delivered before popular audiences in London, Edinburgh, and elsewhere / Percy Faraday Frankland. Source: Wellcome Collection.

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    round or oval bodies, which have not taken up the colouring matter. These bodies are the so-called spores (see Fig. 4), which, in consequence of their great power of resisting destruction, are of such tremendous importance in the propagation of some micro-organisms, and we shall have to refer to them in greater detail later on. Although sufficiently conspicuous by the fact of their not sharing in the Fig. 4.—Spores : [a] chain of bacilli, each containing an oval spore; (<6) free spores; (cj bacilli, each with a spore at its extremity; (<r) swollen bacilli containing spores. gay colours which have been bestowed on the micro-organisms themselves, bacteriological artists arc nevertheless fond of painting them also, which can be done by a little modification of the process I have described. To this end the preparation containing spores is dyed, not with an aqueous solution of one of the basic colouring matters, but with a solution of the