Discourses: Biological & Geological; Essays
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It looked exceedingly like a case of Abiogenesis, or, at any rate, of Xenogenesis ; and it is only quite recently that the real course of events has been made out.
It has been ascertained, that when one of the spores falls upon the body of a fly, it begins to 264 BIOGENESIS AND ABIOGENESIS vill germinate, and sends out a process which bores its way through the fly's skin ; this, having reached the interior cavities of its body, gives off the minute floating corpuscles which are the earhest stag...e of the Empusa. The disease is " contagious," because a healthy fly coming in contact with a diseased one, from which the spore-bearing filaments protrude, is pretty sure to carry off a spore or two. It is "infectious" because the spores become scattered about all sorts of matter in the neighbourhood of the slain flies.
The silkworm has long been known to be subject to a very fatal and infectious disease called the Muscardine. Audouin transmitted it by inoculation. This disease is entirely due to the development of a fungus, Botrytis Bassiana, in the body of the caterpillar ; and its contagious- ness and infectiousness are accounted for in the same way as those of the fly-disease.
What to read after Discourses: Biological & Geological; Essays?
You can find similar books in the "Read Also" column, or choose other free books by Huxley Thomas Henry to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
It looked exceedingly like a case of Abiogenesis, or, at any rate, of Xenogenesis ; and it is only quite recently that the real course of events has been made out.
It has been ascertained, that when one of the spores falls upon the body of a fly, it begins to 264 BIOGENESIS AND ABIOGENESIS vill germinate, and sends out a process which bores its way through the fly's skin ; this, having reached the interior cavities of its body, gives off the minute floating corpuscles which are the earhest stag...e of the Empusa. The disease is " contagious," because a healthy fly coming in contact with a diseased one, from which the spore-bearing filaments protrude, is pretty sure to carry off a spore or two. It is "infectious" because the spores become scattered about all sorts of matter in the neighbourhood of the slain flies.
The silkworm has long been known to be subject to a very fatal and infectious disease called the Muscardine. Audouin transmitted it by inoculation. This disease is entirely due to the development of a fungus, Botrytis Bassiana, in the body of the caterpillar ; and its contagious- ness and infectiousness are accounted for in the same way as those of the fly-disease.
What to read after Discourses: Biological & Geological; Essays?
You can find similar books in the "Read Also" column, or choose other free books by Huxley Thomas Henry to read onlineMoreLess
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