[ 43 + ] 
obferved, is the maximum. This fpace may be di- 
minifhed ; but if it be diminifhed, the matter being 
diminifhed as the fpace and as the denfity jointly, 
mud be more diminifhed than in the fimple pro- 
portion of the denfity. Therefore the diminution 
of the matter will be the leaft poflibie, if, the fpace 
being fuppofed to continue at its maximum, the 
matter be diminifhed in the fimple proportion of the 
maximum of the denfity to the denfity required. 
Various formations of the particles of light might 
be thought of which would anfvver this purpofe. 
It might be anfwered, indeed, upon the fpherical 
hypothecs, by diminifhing the number of fphe- 
rules, retaining the maximum of their fize ; or retain- 
ing the maximum both of fize and number, if it can 
be thought reafonable to diminifh the denfity of each 
particle. But, upon any hypothecs, the diminution 
of matter cannot be lefs than has been faid. That 
is, the matter of each emifilon cannot poflibly 
exceed __' TT th of the maximum. For the. pro- 
portion ot the maximum of the denfity to the 
denfity required, will be found by computation, 
to be that of 20S4 to 1, very nearly. Therefore 
the utmoft probable amount of one emiflion 
is' 1 th of the maximum, be the figure of the 
corpuicles what it will. And the fun may lofe the 
quantity of a whole emiflion 2084 times in a fecond 
without any feniible confequences. 
I cannot apprehend, from any quarter, fo 11 n- 
philofophical an objctftion, as that the extreme 
minutenefs of the particles ot light, which I have 
fhewn to be necellarv, if light be reallv matter, is 
an 
