Late Victorian Tipping Bucket Recording Rain Gauge by Callaghan & Co of London Callaghan & Co Adie himself developed a number

Adie himself developed a number of instruments during his lifetime including the first coincidence rangefinder used in astronomy

The split in premises also saw a split in the Father and Son partnership with William retaining the Cornhill premises in his own right

The centre contains an expertly engraved and silvered compass with a brass catch to hold or release the movement and two sides of the outer edge are provided with a glass level housed in protective brass cases

William’s first son

Late Victorian Tipping Bucket Recording Rain Gauge by Callaghan & Co of London Callaghan & Co Adie himself developed a numberFor sale, a late Victorian tipping bucket recording rain gauge by Callaghan & Co of 23a New bond Street, London. Comprised of a black painted two part zinc case with a graduated base and graduated lift off cover with central hole and siphon to receive rainfall and deliver it to an internal tipping bucket mechanism. An unusually pristine opaline glass dial measures an inch of rainfall around the outer circumference, with a secondary centre dial