ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 208 



to the position C ; the panillel rajs, after having been reflected on to the 

 opa.jne object at 1), then converge in the projection lens E, whence they 





am! if 'I /I'om^ the reversing mirror F on to the screen. Fi^s 15 

 and 16 show how the apparatus can be used for projecting an opaque 



p 2 



