FREE BOOKS

Author's List




PREV.   NEXT  
|<   66   67   68   69   70   71   72   73   74   75   76   77   78   79   80   81   82   83   84   85   86   87   88   89   90  
91   92   93   94   95   >>  
xistence without the mind; and that they are ordinarily conceived with relation to sensible things, to which nevertheless in their own nature they bear no relation at all. 111. As for Time, as it is there taken in an absolute or abstracted sense, for the duration or perseverance of the existence of things, I have nothing more to add concerning it after what has been already said on that subject. Sect. 97 and 98. For the rest, this celebrated author holds there is an absolute Space, which, being unperceivable to sense, remains in itself similar and immovable; and relative space to be the measure thereof, which, being movable and defined by its situation in respect of sensible bodies, is vulgarly taken for immovable space. Place he defines to be that part of space which is occupied by any body; and according as the space is absolute or relative so also is the place. Absolute Motion is said to be the translation of a body from absolute place to absolute place, as relative motion is from one relative place to another. And, because the parts of absolute space do not fall under our senses, instead of them we are obliged to use their sensible measures, and so define both place and motion with respect to bodies which we regard as immovable. But, it is said in philosophical matters we must abstract from our senses, since it may be that none of those bodies which seem to be quiescent are truly so, and the same thing which is moved relatively may be really at rest; as likewise one and the same body may be in relative rest and motion, or even moved with contrary relative motions at the same time, according as its place is variously defined. All which ambiguity is to be found in the apparent motions, but not at all in the true or absolute, which should therefore be alone regarded in philosophy. And the true as we are told are distinguished from apparent or relative motions by the following properties.--First, in true or absolute motion all parts which preserve the same position with respect of the whole, partake of the motions of the whole. Secondly, the place being moved, that which is placed therein is also moved; so that a body moving in a place which is in motion doth participate the motion of its place. Thirdly, true motion is never generated or changed otherwise than by force impressed on the body itself. Fourthly, true motion is always changed by force impressed on the body moved. Fifthly, in circular motion barely relative
PREV.   NEXT  
|<   66   67   68   69   70   71   72   73   74   75   76   77   78   79   80   81   82   83   84   85   86   87   88   89   90  
91   92   93   94   95   >>  



Top keywords:

motion

 

relative

 

absolute

 

motions

 

bodies

 

respect

 

immovable

 

defined

 

apparent

 
things

relation
 

changed

 

impressed

 
senses
 

philosophical

 

likewise

 
regard
 

matters

 
abstract
 

quiescent


participate
 

Thirdly

 

moving

 

partake

 

Secondly

 

generated

 

Fifthly

 

circular

 

barely

 

Fourthly


position

 

preserve

 

ambiguity

 
contrary
 

variously

 

define

 

properties

 
distinguished
 

regarded

 
philosophy

existence
 
subject
 

perseverance

 

duration

 

conceived

 

ordinarily

 

xistence

 

nature

 
abstracted
 

Motion