Cased George IV Altazimuth Theodolite by Alexander Adie of Edinburgh RB Bate having not taken enough notice

having not taken enough notice of the falling barometer

“John Lilley & Son

electrometers

they are covered with an amalgam of mercury

the onset of the more agile aneroid barometer put pay to the success of many of these fascinating instruments and they are therefore seldom encountered

Cased George IV Altazimuth Theodolite by Alexander Adie of Edinburgh RB Bate having not taken enough noticeFor 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