. A manual of elementary zoology . Zoology. THE PROTOZOA AS PARASITES OF MAN 157 in which the English observer Ross played a great part—has made us less helpless to avert its ravages. The measures which are taken to that end are threefold : (1) the destruc- tion of the mosquito, by such measures as have been Anopheles Culex. FIG. 97.—A comparison of the various stages in the life-history of a mosquito (left) with those of a gnat (right).—From Shipley. Note how the larvae and pupae hang from the surface film of the water (represented by a thin line). The organs by which they are suspended conta
. A manual of elementary zoology . Zoology. THE PROTOZOA AS PARASITES OF MAN 157 in which the English observer Ross played a great part—has made us less helpless to avert its ravages. The measures which are taken to that end are threefold : (1) the destruc- tion of the mosquito, by such measures as have been Anopheles Culex. FIG. 97.—A comparison of the various stages in the life-history of a mosquito (left) with those of a gnat (right).—From Shipley. Note how the larvae and pupae hang from the surface film of the water (represented by a thin line). The organs by which they are suspended contain air tubes, and if these be prevented by a film of paraffin from reaching the air the insect is drowned. two views of an egg, magnified. mentioned; (2) the use of quinine to overcome the parasite in the blood and thus destroy the supply of it as well as benefiting the individual patient; (3) the separation of European dwellings from those of the 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 Borradaile, L. A. (Lancelot Alexander), 1872-1945. London : H. Frowde, Hodder & Stoughton
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectzoology, bookyear1920
