444 SUMMARY OF CURRENT RESEARCHES RELATING TO 



camera-lucida free from deformations, the di\isions of the micrometer 

 grow regularly from left to right for the right eye and from right to left 



->jB 



-A\ 



Fig. 74. 



for the left eye. Certain experiments performed l)y the author show also 

 that the images obtained of objects stand out in their true relief. 



