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Geissler tube, 1855.
Electricity and Magnetism
Geissler vacuum tube with 3 "folds", inner spirals, ornamental glass work and 7 bulbs
Clinical centigrade thermometer
Clinical centigrade thermometer, with brass case, made by H. Geissler, German, 1851-1910
Clinical Fahrenheit thermometer
Clinical Fahrenheit thermometer, with case, made by H. Geissler, German, 1851-1900
Dry and Wet bulb thermometers
Dry and Wet bulb thermometers. On Brass stand, by Geissler, 1876.
Geissler filter pump, by Baird and Tatlock (London
Geissler filter pump, by Baird and Tatlock (London) Limited, London, England 1917-1927