### device | instrument | measuring device | thermometer:

Infrared thermometer
* Some infrared thermometers respond to temperature changes in as little as a millisecond.
* are the second largest component of the worldwide infrared market.
* can provide an accurate remotely measured temperature.
* come in both portable and fixed models.
* measure the surface temperature of objects within their field of view.

Liquid thermometer
* are the most common type in use.
* have a hollow tube partially filled with liquid.

Mercury thermometer
* Most mercury thermometers measure temperature.
* are easy to recognize
* are very accurate but breakable
  - easy to break and very difficult to clean up
* become unusable as the molten metal inside freezes up and shatters the glass.
* can break easily, posing an environmental hazard.
* pose an unnecessary risk to our environment and our children
  - both an environmental and a health risk

Oven thermometer
* are thermometers.
* can vary in quality and, consequently, price.

### device | instrument | measuring device | timepiece:

Clock
* All clocks are an investment in the time taken in their making
  - work by counting some kind of rhythm
* Many clocks have time adjust shafts which lower and raise the bob from the front.
* Most clocks measure how many times a repetitive action is carried out
  - use gears to track time
* SOME clocks do considerably more than tell time.
* Some clocks come with three wire cord
  - have metal gears, while others have plastic
  - keep time and keep quiet about it.
  * A 'clock' device that tells the time. Some clocks can give the date as well as the time and a few give other information. There are different types of clocks. A 'watch' type of clock that is small and can be carried. Watches are usually worn on a person's wrist. At one time, watches were commonly kept in the person's pocket
* also demand skilled woodworking with smaller pieces of wood.
* are also present in hormone mechanisms and brain structures
  - books
  - close to living things
  - devices
* are located in airports
  - cars
  - department stores
  - desks
  - homes
  - houses
  - office buildings
  - offices
  - shelfs
  - tables
  - train stations
  - walls
  - machines
* are mechanical devices used to measure or indicate the passage of time
  - precision instruments, and tower clocks have their own particular idiosyncrasies
* are used for clocks
  - decoration
  - people
  - timing
* are, after all, human inventions.
* can also make great gifts as most people enjoy knowing what time it is.
* come in all shapes and sizes, and as in humans, beauty is in the eye of the beholder.
* control the timing of chess games.
* controls circadian period in isolated suprachiasmatic nucleus neurons.
* enable organisms to adapt to their surroundings.
* exist in many forms.
* generally run consistently at the same speed and indicate 'mean time'.
* have a heart
  - alarm
  - faces
  - hands
* includes balance wheels
  - clock faces
  - sections
* is an instrument
* reflect a world view of their times and carry the imprint of their makers.
* run slower in gravitational field
  - strong gravitational fields
* tell the time.
* use different ways to measure time.
+ Clock, Keeping time:
  * Clocks use different ways to measure time. Clocks need some sort of steady beat or motion to track the change in time. Ancient water clocks worked by the steady movement of water from a container with a hole in the bottom to another container without a hole. Other clocks use pendulums, springs and gears to track the change in time correctly.
+ List of chess terms, C, Chess clocks
  * Clocks control the timing of chess games. They show separately the time taken by each player. Electronic clocks can also count the moves made, and apply the set time limits for a game.
  * Clocks go forward one hour.
  * European Summer Time begins on the last Sunday in March. Clocks go forward one hour.