. Rural sanitation in the tropics : being notes and observations in the Malay Archipelago, Panama and other lands. lebra enough to require blasting in the Cut, whenonce exposed to the air it weathers very rapidly ; andstone only a month out could often be kicked into afine black powder. It is really a compressed volcanicash. For a year or two it remains porous; then itbecomes almost impervious to water, as the Depart-ment found to its cost after using it as a coveringto the subsoil pipes. Ancon was not the only placewhere the drainage had been obliterated by theengineers in disposing
. Rural sanitation in the tropics : being notes and observations in the Malay Archipelago, Panama and other lands. lebra enough to require blasting in the Cut, whenonce exposed to the air it weathers very rapidly ; andstone only a month out could often be kicked into afine black powder. It is really a compressed volcanicash. For a year or two it remains porous; then itbecomes almost impervious to water, as the Depart-ment found to its cost after using it as a coveringto the subsoil pipes. Ancon was not the only placewhere the drainage had been obliterated by theengineers in disposing of the spoil from the we remember that the material excavatedfrom the Canal amounts to 212,000,000 cubic yardsof earth, and that every additional yard this has tobe conveyed adds to the cost of the Canal, we canunderstand the dumps must be numerous, andmust affect to a considerable degree the physicaland hydraulic conditions of the country. On thedump were fly-proof latrines for the labourersemployed. After visiting the larvacide factory, which is con-nected by rail with the railway system, and after. Fig. 13.—A Subsoil Dkain covered by stones at Ancon. To prevent water from the pipe washing awaj the railwa) line, the end of the pipedischarges below and against a coveiing. [Fci-c page 134.
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1915
