63 ESSAYS AND OBSERVATIONS 



QiTER. IX. What elfe is the inflexion of 

 liglit towards the fine edges of bodies than a 

 particular cafe of refradion, in which the 

 rays, after being bent by the attradive 

 power, are carried beyond the refracting 

 iurface, and mifs entring it, becaufe of its 

 fmall extent ? For, if the furface of the 

 edge be produced, it will meet the infle(fted 

 rays j and thus the inflexion will become 

 properly refraiftion. And, in like manner, 

 we may confider the inflexion of light off 

 from the edges of bodies, as a fpecies of re- 

 flexion. 



QuER. X. Is It not impolhble that an ani- 

 mal can fee, if the diameter of its eye be 

 much lefs than the interval between the fits 

 of tranfmiffion and reflexion in water, that 

 is, than j--—— -''' of an inch ? 



QuER. XI. There are many experiments 

 which fliew that a yellow and blue ray 

 mixed, make a green one j a yellow and 

 blue powder, a green powder; and a mixture 

 of rays or paints of all the prifmatic colours, 

 ^ white ray or paint : Now, do not the fame 

 experiments equally demonftrate, that the 

 idea of ereen is a confufion or mixture of the 



ideas 



