. The Canadian field-naturalist. Natural history. Fig. 2—The brachydomes lying between the faces (001) and (010) are as follows:—(012), (Oil). (021), (052), (031). (041), (092), (051), (061), (071), (081), (091), (). ^ ^. Fig. 3. Fig. 4. Repeated twinning on the unit prism (110) is very common, producing forms such as are repre- sented by fig. 3 or 4. When this twinning law is the only one involved the angle between the a axes of successive individuals is 62^ 46'. In the cr>'stal represented schematically on fig. 5, the four in- dividuals 1, 2, 3 and 4 are twinned according to this law
. The Canadian field-naturalist. Natural history. Fig. 2—The brachydomes lying between the faces (001) and (010) are as follows:—(012), (Oil). (021), (052), (031). (041), (092), (051), (061), (071), (081), (091), (). ^ ^. Fig. 3. Fig. 4. Repeated twinning on the unit prism (110) is very common, producing forms such as are repre- sented by fig. 3 or 4. When this twinning law is the only one involved the angle between the a axes of successive individuals is 62^ 46'. In the cr>'stal represented schematically on fig. 5, the four in- dividuals 1, 2, 3 and 4 are twinned according to this law, but a fifth individual (x) is twinned on No. 2 with (130) as twinning plane. The angle between the a axes of those two individuals is 57^ 18 . The interpenetration of several individuals. 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 Ottawa Field-Naturalists' Club. Ottawa
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Keywords: ., bookauthorottawa, bookpublisherottawa, booksubjectnaturalhistory
