Nature's hygiene : a series of essays on popular scientific subjects : with special reference to the chemistry and hygiene of the eucalyptus and the pine / by C.T. Kingzett.
- Kingzett, Charles Thomas.
- Date:
- 1880
Licence: Public Domain Mark
Credit: Nature's hygiene : a series of essays on popular scientific subjects : with special reference to the chemistry and hygiene of the eucalyptus and the pine / by C.T. Kingzett. Source: Wellcome Collection.
Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.
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![out the leaves, and which may readily be seen by holding up the leaves to the light. The oil, however, seems to occur more or less throughout the tree. M. Cloez' found* that ten kilos of fresh leaves, taken from branches of an eucalyptus (species not named) killed by frost at the end of 1867, furnished by distillation with water 275 grms., or 2-5 per pent, by weight of oil. In another experiment (species again hot named) eight kilos of dry leaves, gathered at Hyeres, gave, after keeping. them one riionth, 489 grms., or 6 per cent.f From completely diy leaves, which had been kept five years, he obtained only 1*5 per cent, of oil. The percentages given in the following table,]: representing the amount of oil contained in the foliage of different species of the. eucalyptus, were determined by Mr. Bosisto for the exhibition of The next table is compiled from the paper of M. Eaveret-Wattel,§ quoted in a previous chapter :— * Chem. Nevjs^ vol. xsvi., p. 63. t Probably from Eucalyptus amygdalina, judging from the quantity. X See Chem. News, vol. xxxix., p. 169. § Pharm. Journ., New Series, vol. iii., pp. 22 and 43. 1862 :— Eucalyptus amygdalina (or narrow-leaved pepper- mint tree) . . oleosa .... leucoxylon .... goniocalyx . . . i globulus (or blue gum-tree) . obUqua (or stringy bark-tree) 3-313 1-250 1-060 0-914 0-719 0-500](https://iiif.wellcomecollection.org/image/b21535693_0196.jp2/full/800%2C/0/default.jpg)
