Philosophy 2203E Lecture Notes - Lecture 4: Lucretius, Thermodynamics, Atomism
3 Oct 2016
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Those things are natural which, by a continuous movement originated from an internal principle, arrive at some end" (p. 42) The cosmos & the shape & size of the earth: The sphere is obtained from the circle by revolution about some axis. Therefore the sphere is the 1st solid"(you can flip a circle & it still be a circle) Since the 1st figure belongs to the 1st body, the 1st body must be spherical (universe is like an onion-each sphere in the pic causes the next sphere to constantly move) The same holds of every body continuous with that which is prior to it. A rectilinear figure as it revolves never continues in the same room, but where formerly was body, is now none & where now is none, body will be in a moment" (refer to notebook diagram) If the world had some figure with unequal radii, we should have to admit space & void outside the moving body".
