Physics Measuring Instruments

A vernier scale is a secondary scale used on measuring instruments to provide increased precision in reading measurements. It allows measurement of small subdivisions that would be difficult to read on the main scale alone. Thermostat controls temperature, viscometer measures viscosity, and anemometer measures wind speed.

An oscillograph is an instrument that records oscillations or waveforms, particularly electrical or mechanical vibrations. It provides a visual record of how these vibrations change over time. Dynamometer measures force, drinker's apparatus is for respiration, and crescograph measures plant growth.

A crescograph is a device invented by Jagadish Chandra Bose to measure and record plant growth movements. It can detect extremely small movements and growth responses to stimuli. Chronometer measures time, salinometer measures salt concentration, and odometer measures distance traveled.

A phonograph is an instrument for reproducing sound, invented by Thomas Edison. It records and reproduces sound using a vibrating needle etching grooves on a rotating cylinder or disc. Plantimeter measures area, hygrometer measures humidity, and radar detects objects using radio waves.

EEG (Electroencephalograph) is the instrument used to diagnose brain disorders by recording electrical activity of the brain through electrodes placed on the scalp. GM counter detects radiation, ECG records heart activity, and tachometer measures rotation speed.

A teleprinter is a machine that automatically records and prints messages received over telephone wires. It's essentially a telegraph machine that prints received transmissions. Thermometer measures temperature, tachometer measures speed, and telemeter measures distance remotely.

A knot is one nautical mile per hour (1.852 km/h). Historically, sailors would throw a log attached to a rope with knots tied at regular intervals into the water, count the knots that passed through their hands in a timed period (usually 28 seconds), and calculate the ship's speed.

A manometer is specifically designed to measure gas pressure, unlike a barometer which measures atmospheric pressure. Manometers can be open-ended or sealed and use liquid columns to indicate pressure differences. They're essential in laboratories and industrial applications for precise gas pressure measurements.

A seismograph is the instrument that measures and records earthquake intensity and ground motion. It detects seismic waves and creates a seismogram showing wave amplitude and frequency. Unlike a barometer (atmospheric pressure) or hydrometer (liquid density), the seismograph specifically captures earthquake vibrations.

An oometer (or oometer) is a specialized instrument used to measure birds' eggs. It typically measures egg dimensions (length and width) to calculate egg volume and shape indices for ornithological research. It does not measure temperature or heat.

A manometer is specifically designed to measure pressure, particularly gas pressure in closed systems. It uses liquid columns to detect pressure differences. Ammeters measure current, lactometers test milk purity, and saccharimeters measure sugar concentration.

An angstrom (Å) is a unit of measurement equal to 10^-10 meters, primarily used to measure the wavelength of light and atomic distances. It's not used for measuring liquid quantities, cable length, or ship speed.

A konimeter is a specialized instrument that measures dust concentration in air, commonly used in mining and industrial hygiene to monitor airborne particulate matter. It draws in a measured air volume and deposits dust on a glass plate for counting.

A barometer is an instrument used to measure atmospheric pressure. The prefix 'baro-' refers to pressure. While 'Baroscope' is not the common modern term (barometer is), it would logically refer to an instrument showing changes in atmospheric pressure, similar to how a barometer works.