. An account of the Arctic regions [microform] : with a history and description of the northern whale-fishery. Natural history; Sciences naturelles. 4d0 ACCOUNT OF THE ARCTIC REGIONS. ^1. INI'' ;! â > !;â ': J lilH''V''l which resemhle white hair cut into lengths not ex- ceeding a quarter of an inch, are so small and clear, that the exact figure is not easily determined; and the larger exhibit a fibrous or prismatic structure. Some of these are occasionally the third of an inch in length. This genus is only seen when the tempera- ture is near the freezing point. When the thermo- meter is ab
. An account of the Arctic regions [microform] : with a history and description of the northern whale-fishery. Natural history; Sciences naturelles. 4d0 ACCOUNT OF THE ARCTIC REGIONS. ^1. INI'' ;! â > !;â ': J lilH''V''l which resemhle white hair cut into lengths not ex- ceeding a quarter of an inch, are so small and clear, that the exact figure is not easily determined; and the larger exhibit a fibrous or prismatic structure. Some of these are occasionally the third of an inch in length. This genus is only seen when the tempera- ture is near the freezing point. When the thermo- meter is about 28 degrees, the finer specimens occur; when about the freezing, the coarser appear. The latter are very common during fog showers, and ap- pear to be composed of aggregations of the frozen particles of the fog^ and to have their f^;-gin in the lower parts of the atmosphere. 4. Hexagonal pyramids.âThis kind of snow- crystal I have but once seen. A variety, consisting apparently of a triangular pyramid, was observed; but whether its base was a triangular or six-sided figure, similar to No. 96. Plate XI. is doubtful. These pyramids were about the thirtieth part of an inch in height, and fell along with some other curi- ous figures, during a fresh gale of wind from tlie northward, in very large quantity. Figures 44, and 47, Plate IX. represent this kind of crystal. 5. Spiculco or prisms having one or both ex- tremities inserted in the centre of a lamellar crys- tal.âThis is the most singular genus I have ever seen, and has been observed but twice. It re- sembles a pair of wheels, united by an axletree; the wheels consisting of hexagonal or other lamellar crys-. 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 Scoresby, William, 1789-1857. Edinburgh; [London] : Printed for Archibald Constable and Co. , Edi
Size: 945px × 2643px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectsciencesn
