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PHYSICAL anp LITERARY. 19 
Giftance in comprehending the mutual! pe> 
netration of light; for indivifible points, 
eadued with an_ imfuperable repulfive 
power, reaching toa finite diftance, areas 
fubject to interfere, as folid particles of a 
finite magnitude, 
Bho f.. U. 
On the Heating of Bodies by Light. 
g. Ir appears, by Sir Ifaac Newton’s ex- 
periments on the inflexion of light, that 
bodies act upon it at fome diftance; and 
that the fame power, varioufly exercifed in 
various circumftances, is the caufe, like- 
ways, of refraction and reflection. We 
know no inftance of any kind of attrac- 
tion or repulfion in mature which is not 
mutual; we obferve lik=wife that bodies 
‘are heated by the influence of the fun’s 
rays: It is therefore natural to look upon 
this as the effect of the reaction of light 
upon bodies, and that, at a diftance from 
iRhern 5 ; for there is no reafoa to think that 
light 
