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GNR Dumpy Level housed in a fitted mahogany box, clearly stamped 'GNR'. Made by John Davies & Sons Derby as the label clearly shows and also with a date of 5/3/11. The box is brass plated 'District Engineer'. Together with a LNWR Thermometer in a fitted mahogany box with hinges stamped with company initials. A pair of quality instruments.
An early 19th century rosewood improved Marine Sympiesometer with a silvered scale having an acid and hydrogen gas filled siphon tube against a scale adjustable and mercury thermometer - Height 42 cm - The Sympiesometer was conceived as an alternative to the mercury Marine barometer as it was smaller and portable

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