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At the same time he made full notes as to the condition of the young forest, the presence of parasitic plants such as mistletoe, of diseased trees, if any were found, of the nature of the soil, of the drainage of the forest, and of the best way in which the timber sale was to be logged in order to do the least possible damage to the forest.
To-day southern England, apart from London and some other ports, hardly does more than subsist, and its occupations are largely parasitic. The work and the wealth and the trade which support the empire and its burdens have their origin and being in the north. The population not only shifted, but rapidly increased.
If it is really the pelagre, as I have reason to believe, tomorrow you will see me without hair and beard. I would not hesitate, in spite of the astonishment that my appearance would cause." "What good will that do?" "I cannot tell people that I had my hair and beard cut because I have a parasitic disease. Every one knows it is contagious."
Maybe they only came a few years ago, maybe only months ago. But when they tried to invade the unintelligent creatures the exploratory ship found here, they discovered that the new host's body couldn't tolerate them. His body reacted as if they were parasitic invaders, and built up antibodies against them. And those body defenses were more than the virus could cope with."
The parasitic nature of charbon was therefore absolutely demonstrated, first, by the constant presence of Bacillus anthracis in the blood of anthracoid animals, and second, by the pure culture of the parasite and the inoculation of animals with charbon by means of it. Davaine began the demonstration in 1863, and Pasteur finished it in 1877.
This latter class do no injury even though swallowed by man in thousands. They are not parasitic, and are unable to grow in the body of man. Their presence is entirely consistent with the most perfect health, and, indeed, there are some reasons for believing that they are sometimes directly beneficial to health.
Now the saving of a large and complex structure, when rendered superfluous by the parasitic habits of the Proteolepas, though effected by slow steps, would be a decided advantage to each successive individual of the species; for in the struggle for life to which every animal is exposed, each individual Proteolepas would have a better chance of supporting itself, by less nutriment being wasted in developing a structure now become useless.
Here and there where the ground rises slightly above the level of the fens there are dense woods tangled with parasitic creepers and filled with owls. Bats fly from wood to wood. The air on the lower ground is charged with the poisonous gases which exude from the marsh, while in the woods it is heavy with the dank odours of deadly nightshade and poison ivy.
A small number of the less injurious worms may not cause any appreciable symptoms of disease; but the fowl that harbors them is a source of infection to the other fowls. The infectious nature of parasitic disease caused by worms should be recognized more fully than at present by poultrymen.
After that you make in the pot a decoction which confers the gift of invulnerability. Thus just as in Africa the leaves of one parasitic plant are supposed to render the wearer invulnerable, so in Cambodia a decoction made from another parasitic plant is considered to render the same service to such as make use of it, whether by drinking or washing.
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