. Rural sanitation in the tropics : being notes and observations in the Malay Archipelago, Panama and other lands. c Q. o - ROCK POOLS 145 treatment only once in six months, and representeda great saving- in grass-cutting. Walking over what will soon be the bottom of theMiraflores Lake, we saw men clearing away jungleand scrub at contour level 55. This is to prevent muchdead timber being formed when the lake is filled ;for such timber forms a breeding-ground for the edges of the lake are free from timber, waveaction will be sufficient to prevent Anopheles breedingalong the shores,
. Rural sanitation in the tropics : being notes and observations in the Malay Archipelago, Panama and other lands. c Q. o - ROCK POOLS 145 treatment only once in six months, and representeda great saving- in grass-cutting. Walking over what will soon be the bottom of theMiraflores Lake, we saw men clearing away jungleand scrub at contour level 55. This is to prevent muchdead timber being formed when the lake is filled ;for such timber forms a breeding-ground for the edges of the lake are free from timber, waveaction will be sufficient to prevent Anopheles breedingalong the shores, and the danger of ships becominginfected with malaria during their passage throughthe canal will thus be greatly diminished. Ascendingthe dry bed of the Cocoli River, which had beendammed and diverted to form a temporary andauxiliary water-supply for Panama City, we came tosome rock pools. Numerous Culex larvae werepresent in some of them. The pools had been oiledsome days before, and the larvae were young. Theinspector had found Anopheles larvae in them about aweek before, but we found none at the time of myvisi
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1915
