Rexophone crystal set with two pairs of Telefunken headphones (out of three), 1923-1930 Radio Communication 1923-1930
Microscope used by Louis Pasteur in his investigations on silkworm diseases, Paris, France, 1860-1870 Microscopy (Wellcome) 1860-1870
Weighing and measuring machine by John Joseph Merlin, London, 1760-1803 Nursing & Hospital Furnishings 1760-1803