Cryogenics scale, both of which measure from absolute zero, rather than more usual scales such as Celsius or Fahrenheit, with their zeroes at arbitrary temperatures. The word "cryogenics" stems from Greek "κρύο (cryo)" – "cold" + "γονική (genic)" – "having to do with production". Cryogenic fluids with their boiling point in Kelvin Liquefied gases, such as liquid nitrogen and liquid helium, are used in many cryogenic applications. Liquid nitrogen is the most commonly used element in cryogenics and is legally purchasable around the world. Liquid helium is also commonly used and allows for the lowest attainable temperatures to be reached. These
Doctrine of the Mean contrary to the course of the Mean." This guideline requires self-education, self-questioning and self-discipline during the process of self-cultivation. This principle was demonstrated in the first chapter of "Doctrine of the Mean": "The superior man does not wait till he sees things to be cautious, nor till he hears things to be apprehensive. There is nothing more visible than what is secret, and nothing more manifest than what is minute. Therefore the superior man is watchful over himself, when he is alone." This guideline requires understanding, concern and tolerance towards one another. Leniency was demonstrated in the 13th chapter: "When