"272 Chemisches, Pharmaceutisches. — Personalnachrichten. 



are three tannins at least in Eucalyptus kinos and all are determi- 

 nable by reagents. The one which gives the violet coloration and 

 precipitate with ferric Chloride gelatinizes the most rapidly, the one 

 giving a green coloration with ferric chloride also gelatinizes but 

 not so rapidly as the other. The tannin which gives a blue coloration 

 with ferric chloride does not gelatinize in tinctures. The kinos which 

 give this coloration, also a sparce precipitate slow to form, with 

 iodine in potassium iodide, and a comparatively small amount of 

 the copper salt insoluble in ammonia, all contain in excess this 

 tannin, and the tinctures from these do not gelatinize. The astrin- 

 gency value of the several kinos also varies considerabl}^ those 

 giving the green coloration being the least astringent. The same 

 species of Eucalyptus always gives a similar kino, and in this con- 

 stancy follows the rule found to be characteristic of the essential 

 oils of identical species. Those Eucalypts which give oils containing 

 phellandrene, all appear to exude kinos which give the violet colo- 

 ration with ferric chloride, and they, of course, gelatinize in tinc- 

 tures most readily. All kinos contain mixed tannins, although as the 

 species branch off through the various Channels, certain of the 

 tannins diminish in amounts either in one direction or another. The 

 author shows that the addition of a small amount of formaldehyde 

 to the tincture will determine in a few days whether a kino will 

 gelatinize or not. Acetaldehyde also acts in the same way, but is 

 slower in its action, and as a test not so satisfactor}". So far, four 

 Eucalyptus kinos have been found which do not gelatinize in tinc- 

 tures, and they all have a high astringency value. They are obtained 

 from E. nticrocorys, E. calophylla , E. eximia and E. maculata. The 

 tinctures of the two last, however, give precipitates when diluted 

 with water, that of E. calophylla gives a turbidity only, while that 

 of E. microcorys does not give a turbidity even on the addition of 

 a large amount of water. It thus appears that the difficulty of gela- 

 tinized tincture of kinos may be overcome by using these Eucalyptus 

 kinos, and that without the addition of corrigents like glycerol. The 

 paper includes tables illustrating the reactions of the several kinos and 

 also giving füll data in reference to the gelatinization of the tinctures. 

 The author also announced the presence in most Eucalyptus 

 kinos of a well defined organism which will grow in aqueous Solu- 

 tions of these kinos. To this organism may perhaps be traced 

 the marked alteration in some kinos. It is being investigated by 

 Mr. S. J. Johnston, B. A., B. Sc, of the Technological Museum. 



Smith. 



Personalnaehriehten. 



Ernannt: Prof. J. W. Harshberger zum Ass. Professor of 

 Botanj' in Philadelphia. — Prof. Dr. Beneeke zum a. o. Prof. in 

 der philos. Fakultät d. Univ. Kiel. 



Gestorben: Den 16. Januar Dr. F. E. G. Rostrup, Prof. d. 

 Pflanzenpathol. a. d. landw. Hochschule Kopenhagen im Alter von 

 76 Jahr. 



Ausgegreben: IS März IdOy 



Verlag von Gustav Fischer in Jena. 

 , Buchdruckerei A. W. Sijthoff in Leiden. 



