CH. /] 



MICROSCOPE A.\H ACCESSORIES 



33 



58. The Size of the Field of the microscope as projected 

 into the field of vision of the normal human eye (i. e. t the virtual 

 image) may be determined by the use of the camera lucida with the 

 drawing surface placed at the standard distance of 250 millimeters 

 (Ch. IV.) 



59. Table showing the actual size in millimeters of the field of 

 a group of commonly used objectives and oculars. Compare with the 

 graphic representation in Fig. 42. See also 57. 



