120 



Modem Microscopy 



Forceps. — Stage forceps are used to hold unmounted 

 specimens in the field of view while they are examined, 

 there being a fitting on the forceps to go into a hole pro- 

 vided in the limb or the stage of the instrument. 



There are in existence many modifications of the apparatus 

 described in the foregoing pages, the adoption or rejection 

 of which must be left to the suggestions which will be 

 naturally derived from practical experience. But the forms 

 of apparatus most commonly worked with, and those whose 

 merits particularly commend them to the writer's judgment, 

 have been described. 



Eye-shade for Monocular Microscope. 



It is recommended when working with a monocular 

 microscope that the eye not actually employed should 



Fig. 50. 



remain open. Many workers experience no difficulty in 

 doing this, but others are quite unable to succeed. For 

 such the eye-shade shown in the accompanying figure 

 (Pig. 50) will be found very advantageous. It is made 

 of vulcanite, and consists of two pieces jointed in the 

 middle ; one side is bored out to the outer diameter of the 

 draw-tube, over which it slides, and the other portion is 

 just a plain piece of sheet vulcanite which obscures light 

 from the disengaged eye. It was introduced by C. Baker. 



