Instruments and their uses

InstrumentUse
BolometerInstrument for measuring radiation by means of the rise in temperature.
HydrometerInstrument for measuring the density of liquids.
HygrometerInstrument for measuring the humidity of the air or a gas
LactometerInstrument for measuring the amount of water in milk
AnemometerInstrument for measuring wind force.
SalinometerInstrument for measuring the salinity of a solution
AltimeterInstrument for measuring the altitude of an aircraft etc.
GalvanometerInstrument for detecting and measuring electric currents
Scopes
TelescopeOptical instrument using lenses or mirrors to magnify distant objects.
MicroscopeInstrument with lenses for magnifying objects or details invisible to the naked eye.
StethoscopeInstrument used in listening to the heart, lungs, etc. [Greek stethos breast]
KaleidoscopeTube containing mirrors and pieces of coloured glass etc. producing changing reflected patterns when shaken.
EndoscopeInstrument used to examine the interior of a hollow organ or cavity of the body
Oscilloscope Device for viewing oscillations by a display on the screen of a cathode-ray tube.
PeriscopeApparatus with a tube and mirrors, by which an observer in a trench, submerged submarine, or at the back of a crowd etc., can see things otherwise out of sight
Graphs
CrescographInstrument for measuring growth in plants
SeismographInstrument that records the force, direction, etc., of earthquakes.
Cardiograph Instrument recording heart movements.
Heliograph Signalling apparatus reflecting sunlight in flashes.
RadiographInstrument recording the intensity of radiation