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of Edinburgh , Session 1873 - 74 . 
his lectures till the 11th July 1873, when he was attacked with 
inflammation of the lungs, from the effects of which he died on the 
15th of July. 
His most important works were an elaborate memoir on fel- 
spar (1823) ; numerous investigations on quartz, on granite, on 
the metals which crystallise in rhombohedra; on the conditions 
under which carbonate of lime crystallises in the form of calcspar, 
or in that of arragonite, on meteorites, and on the mineralogical 
constituents of trap-rocks. Besides these purely mineralogical 
researches, special interest attaches to his study of the relation 
between the crystalline form and the physical properties of 
minerals. He pointed out that in tourmaline and in electric 
calamine the pyro-electiic polarity is connected in a constant 
manner with the crystalline polarity, and described with great 
minuteness the forms of these minerals. 
In 1857 Marbach showed that the crystals of iron pyrites and 
also those of cobaltine, both minerals crystallising in forms belong- 
ing to the regular system, could be divided into two sets, differing 
extremely in thermo-electric character, the one set more positive 
than antimony, the other more negative than bismuth. Kose saw 
at once that this difference must be related to their crystalline 
form, and that these two sets must possess crystalline characters 
of a right and left handed kind, and at last succeeded in detecting 
the difference between them. 
Most of his researches were published in “Poggendorff ’s Anna- 
len,” in the Transactions of Berlin Royal Academy of Sciences, and 
in the Journal of the German Geological Society. Besides the 
“Reise nach dem Ural,” already mentioned, he published a short 
work on the “ Elements of Mineralogy,” distinguished by beauti- 
fully drawn figures, and one on a crystallo-chemical system of 
classification of minerals. 
Professor Rammelsberg, from whose notice of Rose’s life most of 
the foregoing sketch has been taken, testifies to the remarkable 
kindliness and geniality of his character, to the pleasure which he 
felt in the success of his young scientific friends, and to his hatred 
of polemical discussion. 
