App's clockwork interrupter
1890
Glass cracked by spark from the giant Spottiswoode induction coil
Thermopile, on brass stand
1866-1896
Circular slide rule, c 1870.
1870-1875
Bagot's patent thermometer,1880
1880
Mercury maximum thermometer and alcohol minimum thermometer
1866-1896
Large interrupter by Alfred Apps, London
Clinical Mercury Thermometers, 1877-1890
1877-1890
Mercury in glass thermometer by Alfred Apps. London
1900
Cylindrical induction coil of vulcanite with multi-core mounted on wooden base with trembler
1890-1900
Induction coil for use with X-ray apparatus
1896-1910
Early hand break
1880
Universal shunt
1866-1896
Early form of mercury interrupter
1880
Routledge engineer's rule by Alfred Apps, London
Alfred Apps, London, 10-inch induction coil
1890
Compass-clinometer, Bagot's Patent (No 2227 of 1876) by Apps
Early electro-magnetic engine by Alfred Apps, London
Demonstration Wheatstone bridge
1866-1896
Electrical register for anemometer
1872
Improved Hawthorn slide rule
Chest microscope
1881-1900
True-course finder
1876
Clinical thermometer in wooden case
Large induction coil with accessories.
1902
Henley's universal discharger
Tinfoil paper dielectric condenser
1869
Large induction coil by Alfred Apps
1879
Electromagnetic Engine by Alfred Apps, London.
Components for Spottiswoode Induction Coil
1876
Patent section line ruler, stamped "Apps", with trademark and case
Double Barrelled Air Pump
1866-1911