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Description: | [C] LYDE NAVIGATION DIAGRAMS OF TIDES TAKEN AT SELF REGISTERED GAUGE AT PARTICK WHARF, GLASGOW (printed at the top left corner of the chart which is in the form of a graph with 0.5 cm squares). NIGHT MIDDAY MID (printed along the horizontal axis of the chart). FORENOON TIDES AFTERNOON TIDES. (printed along the horizontal axis of the chart). The hours are set out along the horizontal axis in Roman numerals 25.00-26.38 (depth in feet printed on the vertical axis at 12 noon ) A hatched line with the legend 12. 19 Ft Decs OLD ORDNANCE SURVEY (printed on the horizontal axis).YEAR 1910 SHEET NO. 21 FROM 23RD MAY AT 9.55 A.M. TILL 30th MAY AT 9.30 A.M. (printed and written on the top left of the chart below the title). A hatched line with the legend 26.38 Ft Decs COPE OF QUAY WALLS OF QUEENS DOCK CLYDE DATUM. (printed at the top of the chart). There is also a form at the top right hand corner of the chart for recording the highest and lowest water the headings are FORENOON DATE READING OF GAUGE AFTERNOON DATE READING OF GAUGE. The recordings entered in ink are HIGHEST HIGH WATER ( printed) 30th May 18.6, ( written in ink in the forenoon column). ( printed). LOWEST DO (printed). 24th May 16.10, ( written in ink in the forenoon column). ( printed) HIGHEST LOW WATER 29th May 6.6, ( written in ink in the forenoon column). LOWEST DO( printed) 24th May 5.0, ( written in ink in the forenoon column). HIGHEST HIGH WATER ( printed) 29th May 17.8, ( written in ink in the aftenoon column). ( printed). LOWEST DO (printed). 23th May 16.10, ( written in ink in the afternoon column). ( printed) HIGHEST LOW WATER 29th May 8.0, ( written in ink in the afternoon column). LOWEST DO( printed) 23rd May 5.5, ( written in ink in the forenoon column). 5 10 15 20 25 (depth of water printed on the graph at either end of the chart on the vertical axis) MANU Unsigned. circa 1900 This chart was used on No. 5 tide gauge, the second of three instruments made for the Clyde Docks The instrument consists of a fourteen day (fide Green and Lloyd, 1970, Kelvin's Instruments and the Kelvin Museum, p. 45.) 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 or pencil via a pair of wheels connected to a gear train of two pinions which scaled down the vertical float movement from I ft to 1 cm over a tidal range of about twenty one feet. 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. This chart although undated is probably from 1891 just prior to the instrument being converted to an ink pen system. | 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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