True-course finder
1876
Induction coil for use with X-ray apparatus
1896-1910
Alfred Apps, London, 10-inch induction coil
1890
Compass-clinometer, Bagot's Patent (No 2227 of 1876) by Apps
Early form of mercury interrupter
1880
Glass cracked by spark from the giant Spottiswoode induction coil
Clinical Mercury Thermometers, 1877-1890
1877-1890
Early electro-magnetic engine by Alfred Apps, London
Improved Hawthorn slide rule
Circular slide rule, c 1870.
1870-1875
Mercury maximum thermometer and alcohol minimum thermometer
1866-1896
Thermopile, on brass stand
1866-1896
App's clockwork interrupter
1890
Electrical register for anemometer
1872
Mercury in glass thermometer by Alfred Apps. London
1900
Early hand break
1880
Universal shunt
1866-1896
Routledge engineer's rule by Alfred Apps, London
Clinical thermometer in wooden case
Chest microscope
1881-1900
Circular slide rule
Case for circular slide rule
Case for patent section line ruler
Large interrupter by Alfred Apps, London
Crank Handle for Double Barrelled Air Pump
1866-1911
Cylindrical induction coil of vulcanite with multi-core mounted on wooden base with trembler
1890-1900
Large induction coil made by Alfred Apps
1876
Demonstration Wheatstone bridge
1866-1896
Patent section line ruler
Bagot's patent thermometer,1880
1880
Components for Spottiswoode Induction Coil
1876
Henley's universal discharger
Large induction coil by Alfred Apps
1879
Patent section line ruler, stamped "Apps", with trademark and case
Large induction coil with accessories.
1902
Large induction coil by Alfred Apps
1879
Electromagnetic Engine by Alfred Apps, London.
Induction coil with hammer-break interrupter
1896-1897
Primary coil for large induction coil by Alfred Apps
1879
Polished wooden base on castors
1902
Two ebonite covered pillars
1902
Seven components for Spottiswoode Induction Coil
1876
Glass cabinet containing controls
1876
Coil in cabinet with wheeled stand
1876
Case of small accessories for use with large induction coil
1902
Capacitor for use with large induction coil
1902
Capacitor for use with large induction coil
1902
Fragments of ebonite covering from pillars of large induction coil
1902
Hammer-break interrupter and Ruhmkorff commutator
Glass Cabinet containing glass tube and controls
1876