Our building is currently undergoing some redevelopment. During the relocation of our archive, we have come across some interesting material I want to highlight. We’ve already mentioned the original technical drawings for the Doodson-Légé machine, the archive footage and the Hilbre Island ledger from 1854, but this week I’d like to show you a technical drawing of the Sheerness self-registering tide gauge, from 1872.
The drawing shows the arrangement in detail of the tide gauge house, trunk, gauge and clock. Notes on the drawing explain how the tide level is traced on the revolving cylinder using a marker, which is driven by the cog wheel, operated by the clock work.
The level of detail in the drawing is very impressive, with teeth very carefully drawn in some of the cogs, and someone has clearly put a lot of effort in to creating this piece of work, which is why it’s interesting to see that gauge is consistently spelt ‘guage’. I’m glad we now have spellcheck!