. Mosquito control in Panama; the eradication of malaria and yellow fever in Cuba and Panama. Mosquitoes; Public health. Attack by Drainage 131 area. The extent of the seepage outcrop line may vary with the duration of a rainy season. Some seepage outcrops may be permanent, others intermittent, and yet others may be active only for a short time, during periods of excessive rain, and may not become active every year. The character of the surface soil below the LongLtadinal Seot'ioa Intercepting Tile Drain. OroBS Section Intercepting Xiie Stain- Longitudinal section and cross section of intercep
. Mosquito control in Panama; the eradication of malaria and yellow fever in Cuba and Panama. Mosquitoes; Public health. Attack by Drainage 131 area. The extent of the seepage outcrop line may vary with the duration of a rainy season. Some seepage outcrops may be permanent, others intermittent, and yet others may be active only for a short time, during periods of excessive rain, and may not become active every year. The character of the surface soil below the LongLtadinal Seot'ioa Intercepting Tile Drain. OroBS Section Intercepting Xiie Stain- Longitudinal section and cross section of intercepting tile drain. seepage area may vary. If more or less imper- vious, water remains on the ground surface, and Anopheles axe produced. In places where seepage water is commonly found, it is well to examine all sharp changes of grade in surface topography, and the ground near the toes of abrupt slopes. As the rainy season advances, the line of seepage outcrop often moves up the slope, and in controlling this water the highest points of the outcrop must be determined. Under the conditions existing at Panama it was found best, as a general rule, to. 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 Le Prince, Joseph Albert Augustin, 1875-; Orenstein, Alexander Jeremiah, 1879-. New York London, G. P. Putnam's sons
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyorklondongpput
