iv MODERN SCIENCE 351 



the eye and the much more complete recording of 

 these phases by instantaneous photography. It is the 

 cinematographigil^^ cases, but it 



reaches a precision in the second that it cannot have i 

 &quot;the Jirst. &quot;&quot;Of the gallop of a horse our eye perceives 

 chiefly a characteristic, essential or rather schematic 

 attitude, a form that appears to radiate over a whole 

 period anc1~sTrflil&quot;ttp~^ tiiTie of gallop. ,, Tt is this attitude 

 that sculpture has fixed on theTneze of the Parthenon. 

 But instantaneous photography isolates any moment 

 it puts them all in the same mnk7&quot;ancT &quot;thus&quot; the gallop 

 of a horse spreads out for it into as many successive 

 attitudes as it wishes, instead of massing itself into a 

 single attitude, which is ... .supposed toflash out in a 

 privileged moment and to illuminate a whole pericxi* 



&quot;&quot;&quot;From &quot;this original difference flow *aITthe others. 



A science that considers, one after the other, undivided 

 periods of duration, sees nothing but phases succeeding 

 phases, forms replacing forms ; it is content with a 

 qualitative description of objects, which it likens to 

 organized beings. But when we seek to know what 

 happens within one of these periods, at any moment of 

 time, we are aiming at something entirely different. 

 The changes which are produced from one moment to 

 another are no longer, by the hypothesis, changes of 

 quality ; they are quantitative variations, it may be of the 

 phenomenon itself, it may be of its elementary parts. We 

 were right then to say that modern science is distinguish 

 able from the ancient in that it applies to magnitudes 

 and proposes first and foremost to mea^uTeTrTefru Trie&quot; 

 ancients did incTe^ct^tTyngxpci imeu Lb,&quot;aTn!t^on&quot; tHe other 

 hand Kepler tried no experiment, in the proper sense 

 of the word, in order to discover a law which is the 

 very type of scientific knowledge as we understand it. 



