. Biological studies by the pupils of William Thompson Sedgwick. Published in commemoration of the twenty-fifth anniversary of his doctorate. Biology. 3i8 Arthur I. Kendall K ^-O" absent at the bottom. For this reason holes are bored in the floor, so that mosquitoes may be introduced and exposed at the point of minimum efficiency of the fumigant. The cages are composed of wire netting of a mesh not less than 20 to the inch. This is extremely important; repeatedly the writer has seen Stegomyia jasciata pass through a 17-18 mesh netting. One end is closed with a circular piece of the same m
. Biological studies by the pupils of William Thompson Sedgwick. Published in commemoration of the twenty-fifth anniversary of his doctorate. Biology. 3i8 Arthur I. Kendall K ^-O" absent at the bottom. For this reason holes are bored in the floor, so that mosquitoes may be introduced and exposed at the point of minimum efficiency of the fumigant. The cages are composed of wire netting of a mesh not less than 20 to the inch. This is extremely important; repeatedly the writer has seen Stegomyia jasciata pass through a 17-18 mesh netting. One end is closed with a circular piece of the same material, the seam soldered, and the other end provided with a band of tin, one inch wide, which fits inside the^cylinder, serving the twofold purpose of keeping the cylinder in shape at this end and furnishing a point of attach- "^ ment for the wooden stoppers. I The latter are tapered so that they 1 fit tightly inside the tin lining of the ; wire cage, and at the same time fit tightly into the hole in the side of the box through which the wire cage just passes. A half-inch hole through the long axis of the wooden stopper per- mits the introduction of mosquitoes, and a cork stopper of appropriate size closes this hole when the mosquitoes TOP are in place, preventing loss of mos- FiG. of box. quitoes or fumes. A collection of wooden stoppers which fit the holes in the sides of the box, and which serve to close these openings when they are ^ot occupied by mosquito cages, completes the outfit. The writer has not only tested comparatively the ordinary fumi- gating agents, but has made a series of careful studies to show the relation of results obtained under ideal conditions as initiated in the apparatus above described with those obtained in large buildings. The great amount of fumigating which is being done in Panama permits such comparisons on a practical scale, and, without going too much into detail, the results show in general that a slightly larger amount of fumi
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbiology, bookyear1906
