Pair of Trieder 'Porro' type prismatic opera glass binoculars (3 power & 12mm objective lenses) 1902-1924
Photograph (8 3/4"x6 1/2") of 9 instruments:- Optical bench, three microscopes, dialytic telescope, lens prism, projection prism and two spectroscopes. 1876 loan collection cat.p. 1080 no.14 Photograph (8 3/4"x6 1/2") of 9 instruments:- Optical bench
Photograph of two pairs of James Watt's spectacles. From bromide print (12"x10") of neg no.S.M.3879 (actual spectacles are exhibited with Watt relics Inv.No. 1924-792) Photograph of two pairs of James Watt's spectacles
Photograph (1/4 plate bromide print) and one drawing from above, Lafleur and Roulot's patent binocular opera glass, 1873 Photograph (1/4 plate bromide print) and one drawing from above
Platinum print of Camera Obscura by Chevalier (Inv. 1914-879) from negative S.M.717 Platinum print of Camera Obscura by Chevalier