Cased George IV Altazimuth Theodolite by Alexander Adie of Edinburgh RB Bate electrometers

electrometers

having not taken enough notice of the falling barometer

“John Lilley & Son

The lower half of the dial has a curved thermometer with scale divided for 20-160 degrees of Fahrenheit

they are covered with an amalgam of mercury

Cased George IV Altazimuth Theodolite by Alexander Adie of Edinburgh RB Bate electrometersFor sale, a cased George IV altazimuth theodolite by Alexander Adie of Edinburgh. This rare example is comprised of a horizontal five inch divided circle which is coarse adjusted by hand and then finely adjusted by means of a knurled brass knob attached to top. The centre contains an expertly engraved and silvered compass with a small brass cam to the side of the case, to hold or release the movement. Two sides of the outer edge of the base are also