OPTICKS' 



O R, A 



TREATISE 



OF THE 



REFLEXIONS, REFRACTIONS, 

 INFLEXIONS and COLOURS 



L i G? F H T. 



ALSO 



Two TREATISES 



O F THE 



SPECIES and MAGNITUDE 



O F 



Curvilinear Figures. 



LONDON, 



Printed for SAM. SMITH, and BENJ. WALFORD. 



Printers to the Royal Society , at the Prince's Arms in 

 St. Paul 9 * Church-yard. MDCCIV- 



NOS. 3249-50 (page 162). 

 Titlepage of the very rare first edition, 



