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XVIII.—A Diatomaceous Deposit from North Tolsta, Lewis

Published online by Cambridge University Press:  06 July 2012

John Rattray
John Rattray
Affiliation:
H.M. “Challenger” Commission, Edinburgh.
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Extract

The sample of the remarkable deposit of Diatomite, upon which the subjoined observations have been made, was forwarded to me some time ago by William Morrison, Esq., of the Academy, Dingwall, through my friend Mr John Gunn. With the exception of a brief notice in the newspapers soon after the discovery of the deposit by Mr Morrison a few months ago, and a paper entitled “On some New Localities for the Mineral Diatomite, with Notes on the Chemical Composition of the Specimens exhibited,” in the Mineralogical Magazine and Journal of the Mineralogical Society, vol. vii. No. 32, pp. 30–34, July 1886, by W. Ivison Macadam, F.C.S., F.I.C., Professor of Chemistry, New Veterinary College, Edinburgh, no statistics have been published in connection with the deposit, nor has any account hitherto been given of the Diatomaceœ which play so prominent a part in its composition.

Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 33 , Issue 2 , April 1888 , pp. 419 - 441
Copyright
Copyright © Royal Society of Edinburgh 1888

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References

page 419 note * Letter, dated April 20, 1887.

page 419 note † From Professor Macadam's paper it appears that this loch was drained in 1874.

page 420 note * Macadam, op. cit., pp. 33, 34.

page 427 note * Synopsis British Diatomaceœ, vol. i. pl. xxxvii. fig. 235, 1853Google Scholar.

page 430 note * In taking the averages, Nos. 9 and 10, which are varietal forms, have not been taken into account.