202 SUMM..KY O. CURKENT RESE.KCHES RELATING TO 



f =. U ran be adapted to every form 

 development of projecuon ^^^ ";• J^/'^^i ^.'eopl, vertical, polan- 

 of optical projection O^'^f "^ ' ^^'g^P^.; the simplest form of this 



O 

 ^ 



showing the path of the light-rays ^^^^:^ X^^ 

 uot shown. When used for la. teinpiojecuon p ^^^ ^^^^^ ^^ 

 able mirror C is altered so that the laysoy^ ^^^ ^^.^^ ^^ 



verged in the projection lens Hj^ltei P^ f 'g^^^^j^^j^^le ^.^^^^ -^^.^..^i 

 the carrier at N. For opaque projection, hk j 



