♦ KNOWLEDGE ♦ 



[AcG. 14, 18; 



it 13 not absolutely necessary to have recourse to human forms 

 the fact can be as nell illustrated by the use of geometrical figures 

 knowing the limits of differentiation of the ellipse ire are enabled to 

 csperimeut with a series of ellipses or even with colours instead 

 (t p rtraits At the C n^^ress referred to I proposed to use — uav, 

 di 1 use — similar means to those which have been adopted time out 

 f nund f r den oustrating by rapidlv rotating i disc before the 



ri.tim produce a mean impressi n or the sensation of white 



\s the sobjeit of the production of generic images has 



bLcn again broached in these pag 3 1 beg leave to suggest 



to experimentalists, to photographers, means for perfecting 



tl o ) rocess lo this end a zone of portraits should be 



1 T illy constructed to gyrate round the camera and 



s steadih and eienly bef ri the lens This -noul i permit 



b jf pjrhaits bein^ niceh adjusted prior to the r presen 



a fceisitini pi Up \ number of sitter*! might evtn be 



self e 



1 the. 



lid be c II 

 - BritisV \ 



fact nothing ha; 



a series of ocular spec 

 impression but of diffei 

 himself that thrsp op- 



B des ended from i 



win and his oppo 

 vival of the fittest 



d in effect all the 

 all the carnivora 

 placental animaU 

 animals all ver 



COMPOSITE PHOTOGRAPin AND GENERIC IMAGES. 



[1862]— It was stated in a former letter (1,730) that at t 

 Antwerp Art Congress, about the vear 1800, I proposed to dem( 

 strate, by the presentation of a'number of individual images 

 the same kind, in rapid succession to the eye, thai the rf sultr 

 generic impression would be more pleasing tljan any individi 

 instance— to demonstrate by experiment, in fact, that "the mean 

 the measure of the ideal, of the beautiful. To prove this, howev 



ar Tv'ii.lall explained in his famous Belfast address! 

 : is ni'erely the result of the condensation of matter, we 

 ly justified in supposing it to have occurred or originated 

 Its of the globe's surface, and possibly to be originating 

 rts now. There seems also no reason for sopposing that 



