MifceUanea Curioja. u% 



inftead of the Flint, moft hard Stones (as well 

 as the Cane) may be us'd to the lame effect, as 

 upon trial 1 have found. Add hereto the lately 

 invented Phofphorus, which is a new and admi- 

 rable way of producing a Lucid Subftance by Art, 

 out of a Body in itfelf not Lucid ; and therefore 

 may not unfitly be term'd an Artificial production 

 of Light. 



And then of the Art of Cenferving Lights 

 the Laps Bono?iienfis is a notable Inftance ; and 

 fo happily were the Sepulchral Lamps of the An- 

 cients. 



x. As to Colours, 'tis the greateft part of the 

 Art of Dying to be able to make and fix (that is 

 prelerve,) them ; and the Painters and Limners 

 will own it to be no fmall part of their Skill to 

 be able well to Mix (that is, in effect, to Gene- 

 rate) Colours. 



3. For Imitation of Light and Colours, 'tis well 

 known how far PerfptRivc with the Art of Limn- 

 ing and Shadowing have gone therein, which all 

 tend (brae way to the Advance or Improvement 

 pf Direft Vifion. 



Add to all thefe, That a due Application of 

 Light to the Objeft renders it Vifible, if it were 

 not fo before ; as appears from a dark Room il- 

 luminated $ or elfe makes it better and more truly 

 diicernable by the Senfe of Seeing^ if before it 

 might have been difcern'd. 



Hence the fame Colour, in a diverfe Light, will 

 appear different, and no PiBure can well be di- 

 fcern'd or judg'd of but by its true Light. Be- 

 fides, the Limner will affure you, that he can 

 hardly make true Work, or hit the Air of a 

 Face exactly, unlefs he draw by a North-Light^ 

 by reafon of the fteadinls of that , and the 

 uncertainty of all other Lights whatfoever. 



Which 



