Masterpiece

Fontijn Antiek

English George I diagonal barometer

English George I diagonal barometer

English George I diagonal barometer
Birmingham
c 1720
Height 96 cm, length 75 cm, width 5 cm
Signed: ‘Thomas Cotterell Brimingham Fecit’

The case of burr walnut veneer on pine has walnut moulding and is inlaid on the vertical arm with ebony and sweet-gum stringing. The finely engraved register plates are of silvered brass. The scale runs from 28 to 31 inches and has approximately seven times magnification. The lower plate bears the following weather indications: ‘Stormy’, ‘Much Rain’, ‘Rain’, ‘Changeable’, ‘Fair’, ‘Set.d Fair’ en ‘Gr.t Dra.t’. The glass reservoir is protected by a removable cover. The diagonal system was invented by Samuel Morland who first published it in 1688.  The main purpose of this system was to obtain a magnified scale and thus facilitate reading, thereby revealing minor changes in air pressure.

Fontijn Antiek
Stellingmolen 51
1444 GV Purmerend
+31(0)29 943 64 93
+31(0)6 535 73 816
mfontijn@chello.nl
www.fontijnantiek.com

« All masterpieces