Parasitological investigations upon vegetable organisms found in measles, typhus exanthematicus, typhus abdominalis, small-pox, kine-pock, sheep-pock, cholera, etc / by Ernst Hallier.

  • Ernst Hallier
Date:
1892
Catalogue details

Licence: Public Domain Mark

Credit: Parasitological investigations upon vegetable organisms found in measles, typhus exanthematicus, typhus abdominalis, small-pox, kine-pock, sheep-pock, cholera, etc / by Ernst Hallier. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

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    converging to this opinion. But are the diseases producing decomposition yeast-forming processes—they can only be introduced by means of micrococcus. As all my studies upon vegetables appearing in contagious diseases are based ujion my yeast-doctrine, it is evident, that these investigations as well as the earlier, are wholly unin- telligible without an accurate knowledge of my writings upon vegetable parasites and yeast-formation. Whoever has not my yeast doctrine in mind, must take in hand both works and appropriate their contents. Whoever omits to do this, is not to be pitied for inability to understand me, or for lack of knowledge. In reference to the nomenclature of yeast-forming some modifications have been recently introduced, of which I will give the most important, because heretofore they have ap- peared only in the journals. First, I have designated, conformably to the proposition of the Professors Richter of Dresden, all those forms belong- ing to one fungus-species as morphisms. Generation I call the chief form, which is distinguished from the other generations by essentially varying spore-forming. Thus, for example, are Mucor racemosus Fres. and Penicilliumf crustaceum Fres. different generations ; because the ]Mucor developes theca-spores, but the Penicillium acro-spores. But the varying forms in which the Penicillium appears, as for example, on the rice, Cladospore-like, as common mould in the form of normal Penicillium, &c., are only morphisms, not generations, because the spore-forming is here the same. So is it with the various forms of yeast, the micrococcus, cryptococcus and arthrococcus ; further, their transition form into aerophytic forms, as for example, the Mycothrix chains (Leptothrix auct.), whose remnants were so often called Bacteria, Hormiscium, Oidium lactis, thcTorulaaceti, &c. are regarded altogether as morphisms.