. [Articles about birds from National geographic magazine]. Birds. I' THE PANAMA jMOSOUITU WITH. 011^ These sanitar\- drip-barrels automatically spread oil, drop by drop, over pools, streams, and marshy places, thereby preventing the mosquito from breeding in the water. "He (Ross) proved beyond any peradventure that the Anopheles mosquito is the intermediate host, and that no one can contract malaria except he be bitten by a mosquito which has previously 1)itten a person from that disease" (see page 347"). l)laine upon the mosquito, and charged that it introdu
. [Articles about birds from National geographic magazine]. Birds. I' THE PANAMA jMOSOUITU WITH. 011^ These sanitar\- drip-barrels automatically spread oil, drop by drop, over pools, streams, and marshy places, thereby preventing the mosquito from breeding in the water. "He (Ross) proved beyond any peradventure that the Anopheles mosquito is the intermediate host, and that no one can contract malaria except he be bitten by a mosquito which has previously 1)itten a person from that disease" (see page 347"). l)laine upon the mosquito, and charged that it introduced a poison similar to snake venom into the human system throuqh the biting process. Step by step a closer approach to tlie truth was made, and in 1883 Sir Patrick Alanson demonstrated that the mosquiti) was the intermediate host of the l)lood parasite filaria. l-')iit it was not until Sir Ronald Ross arrived upon the scene with his investi- gations that the real truth of the prin- ci])le of insect-borne diseases came to be tinilerstood. Prior to this Laveran had succeeded in isolating the germ of ma- laria ; and, building upon this foundation, Ross labored to ascertain the exact rela- tion between man and the niosqitito. 34*^. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Washington, D. C. : National Geographic Society
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