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Catalogue number #1596999552
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| Surveying Barometer by Lawrence & Mayo |
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Fine anaroid barometer marked "Surveying Aneroid compensated" and signed Lawrence & Mayo Ltd. London Marked in inches of mercury in the inner circle the outer circle is marked in feet. With the rotatable vernier scale this instrument can read a difference in height (or depth) down to 10'.A magnifying glass which slides round the circumference is provided to aid reading to this degree of accuracy. diameter 3" (78 mm) depth 1.2" (30 mm)Late nineteenth century
Price: £ 380.00
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