. Annual report of the Director of the Bureau of Science ... Philippines. Bureau of Science; Science -- Philippines. Mix^IV 20%watEr StEamed Pat 6-7-13, PLATE XLIX. PORTLAND CEMENT MANUFACTURED FROM PHILIPPINE RAW MATE- RIALS, SHOWING PERFECT SOUNDNESS OF FOUR DIFFERENT MIXTURES FROM ONE 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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Size: 1899px × 1315px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishermanil, bookyear1906