This document lists and describes various scientific instruments and their uses, including the audiometer for measuring sound intensity, bolometer for measuring infrared radiation, cryometer for measuring low temperatures, and dilatometer for measuring changes in volume. It also discusses endoscopes for examining internal body parts, fathometers for measuring ocean depths, gramophones for reproducing recorded sound, and other instruments like the hypsometer, lactometer, micrometer, nephetometer, optometer, pyrometer, rain gauge, spherometer, thermostat, viscometer, and wattmeter.

1. Scientific instruments
and their uses

2. Scientific instruments and their uses

3. Audiometer
•Measures intensity of
sound

4. Bolometer
•Measures infra-red
(Heat) radiation.

5. Cryometer
•Measurement of low
temperature

6. Dilatometer
•Measures change in
volume of substances

7. Endoscope
•To examine internal
parts of the body

8. Fathometer
•Measures depth of the
ocean

9. Gramophone
•Used to reproducing
recorded sound.

10. Hypsometer
•Determines boiling point
of liquids.

11. Lactometer
•Measures the relative
density of milk.

12. Micrometer
•Coverts sound waves
into electrical vibration

13. Nephetometer
•Measures the scattering
of light by particles
suspended in a liquid

14. Optometer
•Used for testing the
refractive power of the
eye

15. Pyrometer
•Measures very high
temperature.

16. Rain Gauge
•Measures Rainfall.

17. Spherometer
•Measures curvature of
spherical objects.

18. Thermostat
•Automatically regulates
temperatures at a
constant point.

19. Viscometer
•Measures Viscosity of
liquid.

20. Wattmeter
•To measure electric
power