Cryogenics Cryogenics In physics, cryogenics is the production and behaviour of materials at very low temperatures. A person who studies elements that have been subjected to extremely cold temperatures is called a "cryogenicist". It is not well-defined at what point on the temperature scale refrigeration ends and cryogenics begins, but scientists assume a gas to be cryogenic if it can be liquefied at or below . The U.S. National Institute of Standards and Technology has chosen to consider the field of cryogenics as that involving temperatures below . This is a logical dividing line, since the normal boiling points of the
Studies in Words may yield a total misunderstanding of what the author meant to say. Those who have a large vocabulary are actually more likely to pick a wrong meaning because they can rationalize its enjambment. Some of the earlier meanings are only partially recalled in stock phrases, such as "world without end," which employs the earlier use of the word "world" to mean 'age'. The words studied are "nature," in all its phrases, especially "human nature"; "sad," which originally meant "heavy"; "wit"; "free", with all its differences from slavery and villainy; "sense", with its two meanings of perception and judgement; "simple"; "conscience"