File:Rural sanitation in the tropics - being notes and observations in the Malay Archipelago, Panama and other lands (1915) (14768722642).jpg

Identifier: ruralsanitationi00watsrich (find matches)
Title: Rural sanitation in the tropics : being notes and observations in the Malay Archipelago, Panama and other lands
Year: 1915 (1910s)
Authors: Watson, Sir Malcolm
Subjects: Tropical medicine Rural health
Publisher: London : Murray
Contributing Library: University of California Libraries
Digitizing Sponsor: MSN

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n the north of Corozal;so there seems little doubt that, like a bird in thewind and a fish in a stream, a mosquito is mostcomfortable when heading the current, and that itprefers to travel against the current when moderatein force. The practical point is, of course, that ifwe could depend on the wind blowing always in onedirection, we should make the centre of the sanitarymosqulto-free area not coincident with the centre ofthe settlement, but to leeward of it. Mosqtiito-traps. — Many years ago, someonesuggested that mosquitoes might be trapped inboxes painted black inside; the theory being thatin the morning the mosquitoes in a house wouldretire to rest in a dark box. The lid of the box wasthen to be closed suddenly ; a few drops of chloroformwere next to be dropped into it through a smallhole, and when stupefied, mosquitoes were to betaken out and burned. Of course this is not sanita-tion ; nor would it produce enough excitement inthe dullest spot to warrant a gamble on the catch..
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A MOSQUITO-TRAP 209 But In Panama, Mr Bath, one of the twodivisional inspectors, Invented a trap of muchInterest. It is made in three pieces, which can betaken apart, and is on the principle of a fish-trap.The bottom piece of the trap Is prism-shaped ; thebase is open ; the two sides lead up to the apex, wherethere Is a narrow slit, through which the mosquitoreadily enters, and from which it rarely escapes.Passing- through another bottom with a similar slit,the mosquito is securely inside the trap. The trapcan be fastened to any part of a house, with theopening either out or in, and it gives some Idea ofthe number of mosquitoes which try to enter orleave the house. It may be left for a month, if thecatches are small; but it Is unwise to leave It longer,for spiders may close It up with their webs. During the great flight of mosquitoes at Mlra-flores, one trap caught 1018 mosquitoes between6 P.M. and 7 a.m. In sixty days an average of seventraps caught 37,268 Anopheles, and in addition

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