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A pink-coloured woolly saussurea and Delphinium glaciale are two of the most lofty plants, and are commonly found from 17,500 feet to 18,000 feet. Besides some barren mosses several lichens grow on the top, as Cladonia vermicularis, the yellow Lecidea geographica and the orange L. miniata.
These spots, when examined by the microscope, were found to contain some of the eggs of the tricocephalus. Some of the flies themselves were then caught, and their intestines presented large numbers of the ova. Similar experiments with the ova of the Oxyuris vermicularis and of the Toenia solium afforded corresponding results.
One of the most surprising chapters of Alexander's knowledge of pathology and therapeutics is to be found in his treatment of the subject of intestinal worms, which is contained in a letter sent by him to his friend, Theodore, whose child was suffering from them. He describes the oxyuris vermicularis with knowledge manifestly derived from personal observation.
But to return to those preventive measures, and having done what we can with the air, we will turn our attention to the drinking water, for in addition to malarial microbes the drinking and washing water of West Africa is liable to contain dermazoic and entozoic organisms, and if you don't take care you will get from it into your anatomy Tinea versicolor, Tinea decalvans, Tinea circinata, Tinea sycosis, Tinea favosa, or some other member of that wretched family, let alone being nearly certain to import Trichocephalus dispar, Ascaris lumbricoides, Oxyuris vermicularis, and eight varieties of nematodes, each of them with an awful name of its own, and unpleasant consequences to you, and, lastly, a peculiar abomination, a Filaria.
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