This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 Excerpt: ... suffering from malarial fever. It has not been proved that malarial fever comes in no other way. It may be possible that this fever is caused by the vapors that arise from marshy places. It increases in any region where the trees are felled, as their destruction interferes with the drainage, and thus gives rise to ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 Excerpt: ... suffering from malarial fever. It has not been proved that malarial fever comes in no other way. It may be possible that this fever is caused by the vapors that arise from marshy places. It increases in any region where the trees are felled, as their destruction interferes with the drainage, and thus gives rise to ponds and marshy places where mosquitoes breed. The wiggle-tail'takes about ten days to become a mosquito. If kerosene is poured upon the water at shorter intervals than ten days, no mosquitoes will hatch. Tin cans, barrels, and hollow stumps containing water, furnish breeding places for mosquitoes (Fig. 157). 318. The negroes in the Southern states seem to have developed in the blood an antitoxin, which enables them to live in "bottom lands" along rivers. In Africa they do not often have the jungle fever, so fatal to Europeans who have not become "acclimated"--that is, whose blood has Fig. 157.--Mosquitoes. Comparison of--The Non-malarial Genus Culex. The Malarial Genus Anopheles. Palpi short. Palpi long. Wings not spotted. Wings sometimes spotted. Legs sometimes spotted. Legs not spotted. Position at rest, parallel to surface. Position at rest with abdomen and hind legs elevated at an angle to surface. Larva, or wiggle-tail, breathes, and rests Larva, or wiggle-tail, is parallel to sur perpendicular to surface of water. face of water when it breathes. The sucking tube and feelers are long in both genera. The long palpi of the malarial genus furnish an infallible sign. The palpi are found on each side of the sucking tube. The feelers are next to the palpi. not developed the antitoxin which kills the germs causing jungle fever. It has been shown that the mosquito is probably instrumental in transmitting yellow fever. 319. Anti...
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Add this copy of The Elements of Physiology for Schools Volume to cart. $37.88, new condition, Sold by Paperbackshop rated 4.0 out of 5 stars, ships from Bensenville, IL, UNITED STATES, published 2021 by HardPress Limited.
Add this copy of The Elements of Physiology: for Schools to cart. $63.74, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2016 by Palala Press.
