Abstract
Der Naturforscher for July 1873, contains, among other interesting matter, an account of observations by Herr Nägeli, among plants in Alpine regions, as to the production of closely-related plant forms. He is led to conclude, (in opposition to the common view), that association is more favourable to the formation of species, than isolation. There are also botanical papers on the assimilation of air-plants under water, and the opening and closing of flowers. In physics and chemistry we have M. Amagat's recent important experiments on the expansion and compressibility of gases, and those of Troost and Hautefeuille on isomeric and allotropic transformations; a notice of M. Bichat's investigation of the influence of aggregate state on magnetic rotatory power, &c. M. Bichat has ascertained a decrease of this power as temperature rises, and entire disappearance of it in the state of vapour. Some striking facts with regard to the meteorological differences between northern and southern hemispheres are from a paper by Prof. Dove to the Berlin Academy. In physiology there are notes on the place of decomposition of albumen in animal bodies, and on the significance of common salt in the animal economy. Astronomy and technology are also represented, and there is a good selection of Kæinere Mittheilungen.
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Scientific Serials . Nature 8, 356 (1873). https://doi.org/10.1038/008356a0
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DOI: https://doi.org/10.1038/008356a0