DAVIDSON'S OLD DUTCH WEATHER GLASS
F. Davidson and Co.
Category
Ephemera
Date
Unknown
Materials
Glass, Paper, Wood
Measurements
146 x 189 mm
Place of origin
Great Portland Street
Order this imageCollection
Lanhydrock, Cornwall
NT 883248.2
Summary
Framed printed instructions for the use of Davidson's patent barometer, LAN.SI.3.
Provenance
A gift of The Hon. Gerald Agar-Robartes, 7th Viscount Clifden, who gave the property to the National Trust in 1953. He continued to liver there until his death in 1966. His sister, The Hon. Everilda, remained at the house until her death in 1969.
Marks and inscriptions
DAVIDSON'S/OLD DUTCH WEATH GLASS/DIRECTIONS./Immerse the Weather Glass in a bucket of water,/holding it as near vertical as possible. The water/entering the spout will cause air bubbles to emerge./Continue until they cease. The air in the body of the/Glass is now effectively imprisoned. Hang it in a/cool place and very soon it will commence to function, the water rising in the spout as bad/weather becomes likely, falling for fine weather./If the weather is going to be very bad the water will bubble out of the spout./NOTE./It is worth mentioning that when the weather is/hot (not when it is going to be hot) the water will rise, acting as it would for rain. If the temperature/falls and the water remains high in the spout, rain/is certain within a few hours./F.DAVIDSON AND CO.,/OPTICIANS,/143 - 149, GREAT PORTLAND STREET,/LONDON, W.1.
Makers and roles
F. Davidson and Co., opticians