Abstract
A PREVIOUS work by the professor of zoology at Heidelberg(“Untersuchungen iiber Strukturen,” 1898), reviewed in NATURE (vol. lx. p. 124), dealt more especially with the microstructure of organic substances, comparing them with the supposed alveolar structure of protoplasm. In the first of the present pamphlets the author describes in minute detail his observations in the same direction made on inorganic substances, more particularly sulphur. Amongst the various globular and crystalline forms produced by the sublimation and subsequent transformations of sulphur, he describes some which have a radial or concentric arrangement of vacuities or air-spaces suggesting an alveolar structure. The subject is, however, treated throughout from a crystallographic rather than from a biological point of view, and much the same ground has been covered in a more concise and earlier paper by Dr. R. Brauns, the professor of mineralogy at Giessen (“Beobachtungen iiber die Krystallisation des Schwefels aus seinem Schmelzfluss,” Neues Jahrb. f. Mineralogie, &c., 1899, Beil.-Bd. xiii. PP. 39–89; 7 plates).
Untersuchungen über Mikrostrukturen des erstarrten Schwefels nebst Bemerkungen über Sublimation, überschmelzung und übersättigung des Schwefels und einiger anderer Körper.
By O. Bütschli Pp. iv + 96; 4 plates. (Leipzig: W. Engelmann, 1900.)
Untersuchungen über die Mikrostruktur künstlicher und natürlicher Kieselsäuregallerten (Tabaschir, Hydrophan, Opal).
By O. Bütschli. Pp. 287–348; 3 plates. (Reprinted from Verhandl. d. Naturhist.-Med. Vereins zu Heidelberg, N.F. Band vi. 1900.)
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Untersuchungen über Mikrostrukturen des erstarrten Schwefels nebst Bemerkungen über Sublimation, überschmelzung und übersättigung des Schwefels und einiger anderer Körper Untersuchungen über die Mikrostruktur künstlicher und natürlicher Kieselsäuregallerten (Tabaschir, Hydrophan, Opal) . Nature 62, 619 (1900). https://doi.org/10.1038/062619a0
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DOI: https://doi.org/10.1038/062619a0