Antique pocket barometer with curved thermometer signed Aitchison London
Made by James Aitchison sometime between 1900 - 1920 and before his takeover of Dollond in 1927, this particular pocket barometer incorporates a curved fahrenheit thermometer and an altimeter. Although these features are often found in pocket barometers, to have all three in one instrument makes this example a little bit more special. It's also worth noting that the barometric scale is 21 to 31 inches, which is greater than the typical range found on standard pocket barometers, and indicates that its main purpose was probably as an altimeter, for use by mountaineers and balloonists of the period, with a revolving altitude scale up to 10,000 feet.
The frosted silvered dial is clean, and engraved'COMPENSATED, AITCHISON LONDON & PROVINCES'. It also has its original bevelled glass crystal and the case retains all of the original blued brass finish. Housed in a Moroccan leather covered outer case in good condition and lined in silk & velvet, it has a working catch that snaps shut when the lid is closed.
In full working order including the thermometer, the barometer measures 50mm diameter and 18mm depth. Please study the photos as they are part of the description, and I will be happy to answer any questions if I can. The item "Antique pocket barometer with curved thermometer signed Aitchison London" is in sale since Friday, March 8, 2019. This item is in the category "Antiques\Science/Medicine\Scientific Instruments". The seller is "voradorprime" and is located in Essex.
This item can be shipped worldwide.
- Period: 1901 to 1950
- Material: Brass
- Type: Barometer