The Notebooks of Leonardo Da Vinci Complete


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Eudoxus, Platonis auditor, in astrologia judicio doctissimorum  
hominum facile princeps, sic opinatur (id quod scriptum reliquit):  
Chaldaeis in praedictione et in notatione cujusque vitae ex natali  
die minime esse credendum." He then quotes the condemnatory verdict  
of other philosophers as to the teaching of the Chaldaeans but says  
nothing as to the antiquity and origin of astronomy. CICERO further  
notes De oratore I, 16 that Aratus was "ignarus astrologiae" but  
that is all. So far as I know the word occurs nowhere else in  
CICERO; and the word Astronomia he does not seem to have used at  
all. (H. MULLER-STRUBING.)]  
Of time and its divisions (916-918).  
9
16.  
Although time is included in the class of Continuous Quantities,  
being indivisible and immaterial, it does not come entirely under  
the head of Geometry, which represents its divisions by means of  
figures and bodies of infinite variety, such as are seen to be  
continuous in their visible and material properties. But only with  
its first principles does it agree, that is with the Point and the  
Line; the point may be compared to an instant of time, and the line  
may be likened to the length of a certain quantity of time, and just  
as a line begins and terminates in a point, so such a space of time.  
begins and terminates in an instant. And whereas a line is  
infinitely divisible, the divisibility of a space of time is of the  
751  


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