Malaria : lessons on its cause and prevention : for use in schools / by H.R. Carter.
- Henry Rose Carter
- Date:
- 1914
Licence: Public Domain Mark
Credit: Malaria : lessons on its cause and prevention : for use in schools / by H.R. Carter. Source: Wellcome Collection.
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![explain difficulties, and answer questions that would naturally aris Now it may be that some of the teachers will not have sufficiei knowledge of the subject to answer the questions which will l asked and give the necessary explanation—for accurate knowled^ on even the rudiments of this subject is not so common—and on th account this little paper is intended for both pupils and teacher The questions marked (a) are intended only for the pupils. Tli others (b) are for the teachers and deal with ideas a little moi complex than the others, yet not especially so. They contain fact however, which a teacher must know to understand the subject at al Some are marked (a) ? as the writer was unable to decide whethe they should be marked (a) or (b). Teachers, however, will use their own discretion in giving t pupils such of the questions intended for themselves as the age an intelligence of the class may justify. Each school should form a field class among the pupils studyin malaria to find the larvae of the different kinds of mosquitoes and i identify them and to learn to recognize the different kinds of place in which they breed; where the eggs of the different families c mosquitoes may also be found and identified. Culex mosquitoes will be found in almost any standing wate especially in rain barrels, in pools and puddles almost anywher Aedes (Stegomyia) calopus will be found in artificial containei about houses. Anopheles will be found in the clean, shallow, shad; grassy pools described. The first two can be seen at once an recognized as not being Anopheles by their position, hanging hea downwards. If one leans over a pool containing Anopheles an waits a little he will be able to see these larvae lying flat at tl surface of the water. He must wait a little, however, as they are aj to dive when one approaches them; also they frequently run to tl edge and hide in the grass, so they are sometimes not so easy to s( even when present. The best way to get them is with a dipper an a white saucer. Dipping in the water unless you see larvae is n( the best way; make a quick stroke, just skimming the water tow arc the edges of the pool. Carry it into the grass, because the larv are in the grass. Do not make this stroke until you have given tl larvae time enough after you arrived to dive and come to the to] Another way is to press the edge of the dipper suddenly under wate so that the stream of water running into it may wash the larv into the dipper. Pour the contents of the dipper into the sauc( and you will see the larvae against the white ground. The youn Anopheles are light grey, banded with black and very slender. Tl older ones are red, green, black, etc., the color depending on win they eat. They are less slender. All are quick in movement, an](https://iiif.wellcomecollection.org/image/b31366776_0006.jp2/full/800%2C/0/default.jpg)
