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| Barometers |
| Kew Barometers |
Kew-type station barometers to Met Office pattern.
In the Kew barometer atmospheric pressure acts directly on the surface of the mercury in the cistern, causing the mercury level in the column to rise or fall. Careful construction of the column and cistern ensures that the ratio of level changes resulting from a given change of pressure remains constant, so that the pressure can be read directly off the scale, using a vernier.
Please note that all precision barometers are supplied in a purpose-built fibreboard case with a polystyrene cutout inner to support the instrument.
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60 |
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Kew-type station barometer (Met Office pattern)
with silvered scales, polished brass fittings and stainless steel cistern. Gimbal mounting, short arm and wall-mounting bracket. Nominal bore of mercury column is 7.7mm. Normal range is 870/1100 mb (h Pa) or 650/825mm Hg.
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61 |
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Kew-type station barometer (Met Office pattern).
Similar to No 60 but for use on board ship. Gimbal mounting, long arm and fixing bracket. No photograph available currently.
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66 |
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Direct reading barometer
with silvered metal scale mounted on a polished hardwood board with spirit thermometer and separate °F and °C scales. Nominal bore of mercury column is 2mm. Normal range is 780/1060 mb (h Pa) or 585/790mm Hg.
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60E |
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Kew-type station barometer (Met Office pattern)
As No 60 but for extended range. See chart below.
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59 |
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Polished hardwood display case
with glazed front and side panels, lock and key.
145mm (6”) x 160mm (6 1/2”) x 1230mm (48 1/2”)
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64 |
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Wooden carrying case with rope handles
suitable for Kew pattern barometers Nos 60 and 61. Weight of 3.5kg.
980mm (39”) x 100mm (4”) x 100mm (4”)
Please note that all precision mercury barometers are supplied in a purpose-built fibreboard case with a polystyrene cutout inner to support the instrument.
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