. Bulletin - New York State Museum. Science. Plate 91 400 350 300. Tensile strength, in pounds per square inch, shown by mortar briquets Portland briquets contain 3 sand, 1 cement. Natural briquets contain 1 sand, 1 cement. RESULTS OF TESTS FOR TENSILE STRENGTH. 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 New York State Museum; New York State Museum. Albany : New York State Education Dept

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Keywords: ., bookcentury1800, bookdecade1880, booksubjectscience, bookyear1887