44 HOW TO USE THE MICROSCOPE 



disc of stout glass. This tube is capped with a 

 shding cap in which is a thin cover-glass. The 

 object is placed dry, or more generally in a little 

 water, on the thick glass disc, and then the cap is 

 gently lowered upon it so that it is held between 

 the two glasses. Both glasses ought to be carefully 

 cleaned before and after use. Live cages vary in 



Fig. 16. — Live Cage. 



price according to quaUty and size ; they are hsted 

 as low as 2s. 6d. (see Fig. 16). 



Stage forceps (Fig. 17) are sometimes convenient 

 for holding insects and other unmounted objects 

 during examination. They are provided with a 

 fitting which slips into a convenient hole on the 



Pig. 17. — Stage Foeoeps. 



stage, or Umb, of the microscope, and they are so 

 constructed that the object can easily be brought 

 into the field. The cheapest forms consist of forceps 

 in suitable mounts ; better kinds have forceps and a 

 brass well, containing cork, into which pins holding 

 the object can be thrust. One of the latter costs 

 5s. or 6s. 



