. Annual report of the Director of the Bureau of Science ... Philippines. Bureau of Science; Science -- Philippines. Fig. 1. A leaching vat built on the ground, but high enough so that the mud may be removed by gravity after the leaching is 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 Philippines. Bureau of Science. Manila : Bureau of Printing

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Keywords: ., bookcentury1900, bookdecade1900, bookpublishermanil, bookyear1906