Archelaus (philosopher) Archelaus (philosopher) Archelaus (; ; fl. 5th century BCE) was an Ancient Greek philosopher, a pupil of Anaxagoras, and may have been a teacher of Socrates. He asserted that the principle of motion was the separation of hot from cold, from which he endeavoured to explain the formation of the Earth and the creation of animals and humans. Archelaus was a philosopher of the Ionian School, called "Physicus" from having been the first to teach natural philosophy at Athens. This statement of Diogenes Laërtius, is contradicted by Clement of Alexandria, but the two may be reconciled by supposing that Archelaus
Tub (unit) a tub of salt was 18 Imperial gallons. Tub (unit) Tub was a unit of capacity or of weight used in Britain and elsewhere. British laws for the sale of goods defined a tub of butter as a receptacle of a size which could contain 84 pounds of butter. 1 tub of butter or cheese = 84 pounds 1 tub = 1.5 Firkin (1 Firkin = 56 lbs) 1 tub = The "Oxford English Dictionary" has quotations illustrating other values of a "tub" as a unit: In Newfoundland, Canada, a tub of coal was defined as 100 pounds, while a