Thermometers
Surveying equipment
Spectrographs
Sextants
Retorts (Equipment)
Radar
Particle accelerators
Nuclear reactors
Meteorological instruments
Magnets
Kites (Scientific)
Gyroscopes
Geiger counters
Gauges
Electronic apparatus & appliances
Cyclotrons
Compasses (Direction indicators)
Bathyspheres
Astronomical instruments
Alidades
Telescopes
Microscopes
Optical devices
