German fluid level
Dip circle in glazed wooden case on wooden base
1900-1980
Dip circle
Dip circle in glazed case
1950-1954
Dip circle with anti-parallax mirror
1954-1983
Inclinometer in metal case
Dip circle by W.B. Nicholson Ltd.
1921-1969
Inclinometer from Farman Long Horn Aeroplane
Dip circle and magnetometer by Brunner
1884
Dip circle by Robinson, c.1830
1830
Dip circle by Robinson, c. 1830
1830
Dip circle by Robinson & Barrow, London, c.1840
1842-1845
Gough-Turner Inclinometer
Glaholm and Roberts Ltd. inclinometer
Dip circle with boxed needles, used by Sir J.C. Ross
1839
Dip circle by Henry Barrow, London, 1851-1864
1851-1864
Dip circle by Brunner, 1884
1884
Rectangular inclinometer
Dip circle and components, by Robinson, c.1830
1830