XVI. 0. 3^5(6t^- Geometr^. 285 



2584 Gnomonica iive Horologiorum folarium 

 defcribendorum methodus facilis. Norimb. 

 1731. 8. 



P585 Melchior Ohfens ^if?erfun(!* ßrrf, i6l6* 



2586 A compleat wSyflem of Optiks by Robert 

 Smjth, Cäntabr. 173 8» 4. 



^587 ^ßisd ie^rbegrif ber Dptif/ mit Tfetttounge« 

 \x\\^ 3i^f<^ß^« au25gear6citet Don Abrah. Gottb 

 Käßner. 3(I(mb, 1755» 4» 



XVI. 



