Earth thermometer with bent stem, c. 1925.
1925
Optometer, objective or subjective
1831-1900
Pocket Prismatic Compass
1890-1914
Watkin's type clinometer
1890-1914
Falling-plate apparatus by Baird and Tatlock (London) Ltd.
1896-1918
Mercury-in-glass thermometer mounted on wood
1878-1911
Ebony and brass sextant.
1862-1868
Artificial black glass horizon.
1865-1871
Brass Mounted Rapid Euryscope Lens
Perken, Son and Rayment Rollholder
1884-1894