On the left hand side is a Fahrenheit scale thermometer with a delicate elongated reservoir reading 27 to 130 degrees F. At the base is a sector for the rotating recording disc. To operate the sympiesometer simply read the thermometer and set the RHS temperature scale to that reading. Pointer will then indicate the barometric pressure.
The instrument is in excellent condition and working well but the accuracy is not guaranteed. COLLECTION: Item situated in Northwood, Middlesex between Watford, Herts & Pinner, Middlesex. This item is in the category "Antiques\Science/Medicine\Scientific Instruments". The seller is "weatherzone25" and is located in this country: GB. This item can be shipped to United Kingdom.