Drinker’s apparatus: to help breathing in infantile paralysis.
Dynamo: The origin of electricity in a Dynamo is the transformation of mechanical energy into electrical energy. It depends on the principle of electro-magnetic induction whereby a current is produced on traversing a magnetic field.
Electroencephalograph (EEG): It is the technique of recording and interpreting the electrical activity of the brain. Records of the electrical activity of the brain, commonly known as “brain waves”, are called electroencephalograms or electroencephalographs. EEG is the common abbreviation for both the technique and the records.
Epidiascope: for projecting films as well as images of opaque articles on a screen.
Eudiometer: It is a glass tube for measuring volume changes in chemical reactions between gases.
Fathometer: is an instrument used for measuring depth of the ocean.
Galvanometer: an instrument for measuring currents of small magnitude.
G.M. Counter (Geiger Muller Counter): This special device is used for detecting the presence of radiation and counting certain atomic particles.
Gramophone: an instrument with which we can reproduce the sound recorded by a suitable recording apparatus. It is fitted with a special type of apparatus known as sound box invented by Berliner.
Gravimeter: is an instrument for recording measurement under water and to determine the presence of oil deposits under water.
Gyroscope: is an instrument used to illustrate dynamics of rotating bodies. It is a type of spinning wheel fixed to the axle.
Hydrometer: is an instrument used for measuring the specific gravity of liquids.
Hydrophone: is an instrument used for recording sound under water.
Hygrometer: is an instrument used for measuring humidity in air.
Kymograph: is an instrument used to record graphically various physiological movements i.e., blood pressure, heart beating, study of lungs etc in living beings.
Lactometer: is an apparatus used for measuring the purity of milk.
Manometer: for determining the pressure of a gas.
Mariner’s Compass: is an apparatus which is used to guide the sailors. The needle always points north-south.
Micrometer: is an instrument used for converting sound i.e., fraction of the lowest division of a given scale.
Microphone: is an instrument used for converting sound waves into electrical vibrations.
Microscope: is an instrument which is used for magnifying minute objects by a lens system.
Microtome: is used for cutting an object into thin parts for microscopic inspection.
Odometer: is an instrument by virtue of which the distance covered by wheeled vehicles is recorded.
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23/11/2015
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