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Description: | SIR WM THOMSON'S TIDE GAUGE No. 5 J. White Glagow. (inscribed on the clock mechanism below the second and minute dials). (The hours are marked in Roman numerals in two groups of twelve around the top of the chart drum). CLYDE TIDES KELVINHAUGH GLASGOW 6P.M. MIDNIGHT 6 A.M. NOON (printed on a 1cm squared graph paper chart wrapped round the recording drum and attached with masking tape, removed see GLAHM 113558). DES THOMSON,William,Lord,1st Baron Kelvin of Largs. circa 1880 Glasgow, Scotland. MANU J. White. 1882 209, Sauchiehall Street, Glasgow, Scotland. This tide gauge, the second of three instruments made for the Clyde Docks, consists of a fourteen day pendulum clock mechanism. It drove a chart drum on which was drawn a pencil record of the height of water in the dock. This was achieved by means of a copper float in a protective tube connected to a stylus via a pair of wheels connected to a gear train of two pinions which scaled down the vertical float movement from 1ft to 1cm over a tidal range of about 21ft.
The instrument was completed in 1882 and was presumably used at "Kelvinhaugh" until it was converted to a pen recorder in 1891. The counterweight and pen attached are from 1891. GLAHM 113558 was the original counterweight and pencil holder from 1882. The instrument may have then been transfered to the "Partick Wharf Queen's Dock" (It is unclear if this apparent change of location was actual or due to a change of name. It requires further research to clarify this since both the charts and drums are interchangeable it may be that these items are from one of the other two instruments). It was replaced by an improved instrument in 1910 which is consistant with the chart on the spare drum which is dated from the 23rd to the 30th May 1910. See GLAHM 13359 and 113560. | License: | http://www.hmag.gla.ac.uk/spirit/rights/ | Publisher: | Hunterian Museum and Art Gallery, University of Glasgow | Rights holder: | Hunterian Museum and Art Gallery, University of Glasgow | Subjects: | SCIENTIFIC COLLECTION : | Source: | Hunterian Museum | Creator: | Hunterian Museum and Art Gallery, University of Glasgow | Identifier: | http://www.huntsearch.gla.ac.uk/cgi-bin/... | Language: | en-GB | Go to resource |
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