NATS 1710 Lecture : ppt Jan 10 to Jan 16.ppt
22 Mar 2013
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Material units not mathematical entities constitute the basis of matter. Matter is ultimately composed of very small indivisible pieces-atoms. Atoms have specific properties eg ever moving,infinite in number,invisible,innumerable different shapes. Platonic atomism -amalgamation of atomism and pythagorean ideas. Corresponds to the twelve signs of the zodiac. Assigned to air as offering a smaller resistance to motion that the icosahedron. 20 sided figure-the icosahedron- each side was an equilateral triangle. Change is purposeful-everything is in a process of becoming. Animate and inanimate are endowed with a sense of purpose. Purpose of an acorn is to grow and develop into an oak tree. Inanimate objects move in a purposeful way. Cosmos differentiated between (i)the region interior to the moon"s orbit (ii) region between the moon"s orbit and the celestial sphere. Realm of man, corruption and change-region of imperfection. (i) natural motion was either up or down-did not require a force and was purposeful.
