Grace's Guide To British Industrial History

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Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 167,051 pages of information and 246,705 images on early companies, their products and the people who designed and built them.

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,919 pages of information and 233,587 images on early companies, their products and the people who designed and built them.

Skiadan

From Graces Guide

Mikhail(?) Skiadan

1829 'MICROMETER.— In one of the late numbers of Beck’s Repertorium an account is given of a Mr. Skiadan’s (a Russian) invention of a micrometer capable of measuring the ten thousandth part of an inch with accuracy.— Literary Gazette. [We have seen two micrometers invented and used by Mr. Buchanan, of this town, by which he can measure with the greatest accuracy the one millionth part of an inch. He, however, prefers using the simple micrometer, by which he measures the one thousandth part of an inch, and which he thinks is able to answer all useful purposes. His tables of the comparative anatomy of the organ of hearing were formed from measurements taken by the above instruments.— Hull Packet. [1]

PRESENTS RECEIVED BY THE ROYAL SOCIETY, From 20th November 1828, to 18th June 1829; with the names of the donors. ERIOMETER: 'SKIADAN (M.) Description d'un Eriometre, ou Instrument pour mesurer la Finesse de la Laine, de l'Invention de M. Skiadan; publiee par M. le Doct. Hamel. 8vo. Moscow 1828.' Donor: Dr. Hamel [2]. Note: Dr Hamel is probably Joseph Christian Hamel.

'The Skiadan measure consists of two metallic bars arranged like the arms of tongs. To one of these bars is attached a long double lever indicator, the extreme point of which, when the bars are separated, over a graduated arc, the degrees of which correspond with the size of the opening between the bars magnified 2,000 times. One degree of the scale being 50 English inch would consequently show variations of 0.00001 of an inch or 0.000254 millimeter.'[3]


See Also

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Sources of Information

  1. London Courier and Evening Gazette - Wednesday 12 August 1829
  2. [1] Philosophical Transactions of the Royal Society of London, Vol. 119 (1829), pp. iii-vii. Published by: Royal Society. Stable URL: https://www.jstor.org/stable/107760. Accessed: 01-10-2024
  3. [2] Report upon an examination of wools and other animal fibers by McMurtrie, William, 1851-1913; United States. Dept. of Agriculture