so? 



« is a property inseparable from time, and which, m a 

 -» manner, constitutes its essence, that each of its part. 

 " succeeds another; and that none of them, however con- 

 " tiguous, can ever be co-existent. For the same reason 

 « that 1737 cannot concur with the pi^esent year, 1738, 

 « every moment must be distinct from, and posterior or 

 " antecedent to, another. It is certain, then that time,, 

 " as it exists, must be composed of indivisible momentsr 

 - for if in time, we could never arrive at an end ot 

 " division, and if each moment, as it succeeds another 

 « were not perfectly single and indivisible, there would 

 » be an infinite number of co-existing moments; which, 

 » I believe, will be allowed to be an arrant contradjc 

 « tion " This last point he proves from Malezieu. ' hx- 

 « istence, it is evident, belongs only to unity, and is ap- 

 « plicable to number, only on account of the units it 

 " contains. Twenty men may be said to exist, but it is 

 « only because one, two, three, &c. exist; and, it you 

 " deny the existence of the latter, that of the former falls 

 *' of course. It is, therefore, absurd, to suppose any nmn- 

 «' ber to exist, and yet deny the existence of units. J3ut 

 how far this division may extend, cannot be perfectly as- 

 certained. It is certain, it can be carried far beyond 

 our ideas of it; and that, by our auricular perceptions, 

 it may be carried much farther, than by our ocular per- 



ceptious. ^, , ^ ., 



Thus by the experiments of Chevalier D Arcy,"^ it ap- 

 pears, that five or six distinct sensations, of a luminous 



* Mem. Par. 1165. 



