. Annual report. New York State Museum; Science; Science. Fig. 6 Fig. 7 Fig. 8 having for common base the above mentioned basal section and with their vertexes lying on the vertical axis at definite proportions of its length. Such a series of pyramids is shown in figure 6 the proportions of the inter- cepts on the vertical axis being chosen to show some of the more frequent pyramids of the second order of calcite. The possible number of forms of this type is not limited save by the law of rational indexes. The symme- try of pyramids of the second order is that of the prism of the second order.

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. Annual report. New York State Museum; Science; Science. Fig. 6 Fig. 7 Fig. 8 having for common base the above mentioned basal section and with their vertexes lying on the vertical axis at definite proportions of its length. Such a series of pyramids is shown in figure 6 the proportions of the inter- cepts on the vertical axis being chosen to show some of the more frequent pyramids of the second order of calcite. The possible number of forms of this type is not limited save by the law of rational indexes. The symme- try of pyramids of the second order is that of the prism of the second order. In combination with forms of rhombohedral symmetry the faces of pyramids. 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. Albany : University of the State of New York

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectscience, bookyear1902