Clinometer, serial no.3061 with leather case marked Matthews & Sons 1907, made by F. Barker & Sons, London, 1906. Owned by Paske (Diameter 72 mm) Clinometer in case, 1906-1907
Horizontal sundial signed F. Barker and Son, Scientific Instrument Makers LONDON E.C., gnomon set for latitude 33 deg. 13 min, engraved with tables of data for the equation of time, estimated date 1850-1899. Horizontal sundial signed F. Barker and Son
Demonstration sextant, green-crackle finish aluminium frame, polished limb and wooden handle in fitted square wooden case, instrument unsigned but made by Francis Barker and Son, 12 Clerkenwell Road, London, 1925-1931. Consists of polished aluminium130° scale (0° to 130°) with 1° divisions and aluminium vernier (1’), no shade filters and pinhole sighting vane. Aluminium demonstration sextant.