PLATE 18. 



Small room arranged for making lantern slides and enlargements on bromide paper. 



The parts of the window shutter are as follows : ( I ) frame work, (2) circular piece giving rotary motion, (3) one ol Iwo stationary piece 

 under which No. 4 slides, (4) negative carrier, ( 5) one of two stationary pieces under which No. 6 slides, (6) side pieces designed to cut 

 out all the side light except that which comes through the negative. 



