. Annual report. New York State Museum; Science; Science. 22 NEW YORK STATE MUSEUM pairs. Thus in figure 5 every plane of the second order prism is symmetri- cally disposed to its corresponding adjacent face on the right and left. A very limited number of dihexagonal prisms are recorded for calcite. These are 12-sided prisms the planes of which are parallel to the vertical axis and intersect all three of the basal axes at unequal distances. The alternate lateral edges are similar and the faces are symmetrical in adjacent pairs. The forms are of comparatively rare occurrence. Pyramids. Assuming
. Annual report. New York State Museum; Science; Science. 22 NEW YORK STATE MUSEUM pairs. Thus in figure 5 every plane of the second order prism is symmetri- cally disposed to its corresponding adjacent face on the right and left. A very limited number of dihexagonal prisms are recorded for calcite. These are 12-sided prisms the planes of which are parallel to the vertical axis and intersect all three of the basal axes at unequal distances. The alternate lateral edges are similar and the faces are symmetrical in adjacent pairs. The forms are of comparatively rare occurrence. Pyramids. Assuming the basal section of the prism of the second order shown in figure 5, suppose a series of double pyramids to be constructed. 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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