Binocular microscope with divided objective, on extraordinary frame with pulleys and weights, invented by Prof. Aubert, signed by H. Westien, German, 1870-1890 Binocular microscope with divided objective 1870-1890
Myoscope by Clement Clarke Ltd., slide set and red and green screen for fitting to front of projector missing, English, 1923-1940 Myoscope by Clement Clarke Ltd. 1923-1940
Motorised pestle and mortar, by Pascall Engineering Co., Crawley, 1930-1937, used in Guy' s Hospital pharmacy, 1937-1976 Motorised pestle and mortar 1930-1937