Letters on Iceland: containing observations on the natural history of the country, antiquities, manners and customs of the inhabitants, &c. &c. Made, during a voyage undertaken in the year 1772, by Sir Joseph Banks, P.R.S. assisted by Dr. Solander, F.R.S. Dr. J. Lind, F.R.S. and several other literary and ingenious gentlemen / written by Uno von Troil ; with notes and additions by the translator. The whole revised and corrected by E. Mendes da Costa.

  • Troil, Uno von, 1746-1803.
Date:
1783
Catalogue details

Licence: Public Domain Mark

Credit: Letters on Iceland: containing observations on the natural history of the country, antiquities, manners and customs of the inhabitants, &c. &c. Made, during a voyage undertaken in the year 1772, by Sir Joseph Banks, P.R.S. assisted by Dr. Solander, F.R.S. Dr. J. Lind, F.R.S. and several other literary and ingenious gentlemen / written by Uno von Troil ; with notes and additions by the translator. The whole revised and corrected by E. Mendes da Costa. Source: Wellcome Collection.

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    be obferved for trying the powder that fills up the cavities ; it only feems to melt a little eafier than the folid fiib- ftance furrounding it. 26. The bafaltfroin Laugarnas per- fectly refembles coarfe trapp, though it has more white particles, and fome- times cryftallizatioiis as large as a cherry-ftone; the dark-grey and white parts prove to be entirely of the fame nature by the blow-pipe, becomes fluid by itfelf, and produces a fudden effervefcence with fal fodie, but with- out being quite diflblved by it: it is exactly as the preceding fort. 27. Black, folid glofly trapp, knotty within, and refembling wood in its internal flru6lure, being full of fibres. Many pieces are grown to a cruft of pumice on one fide or another, though their edges are quite frefli and finooth; whence we may conclude, that they themfelves have not been melted, but have either been thrown into the lava, which was already burnt out, or that the lava has flowed over them : forne part of it however leems to