PRACTICAL HISTOLOGY. 



FIG 3. Pinewood Cabinet to hold Sixty Slides. 



ringing, i.e., those mounted in glycerine or Farrant's solution. 



Only extra-thin covers (or those sold as No. i) should be used. 



It is well to measure the thickness of the covers, and to use for 



mounting only those that are less than .006 inch in thickness. 



Get half-an-ounce 

 of f-inch circles, 

 and the same 

 weight of |-inch 

 squares. It is con- 

 venient to have 

 a few circles and 

 squares somewhat 

 larger, viz., i inch 

 and i^ inch in dia- 

 meter, for mount- 

 ing particularly 

 large sections. 

 When a large num- 

 ber of sections are 

 mounted under 

 one cover-glass, as 



in serial preparations, it is well to have oblong cover-glasses of a 



still larger size. 



4. A Wooden CaM- 

 net, fitted with trays 

 for holding the mounted 

 specimens. It should be 

 capable of holding at 

 least 60 slides, and the 

 slides should lie on the 

 flat. A convenient form 

 is shown in fig. 3. Some 

 prefer the flat com- 

 pressed paper trays 

 shown in fig. 4. 



5. Two Mounted 

 Needles in handles. 

 The student can easily 

 make these himself. Fix 

 a sewing-needle into the 

 end of a pen-holder, 



allowing only about \ inch of the needle to project. The needles 

 should always be kept bright and polished. A convenient form is 

 to fix a sewing-needle into a strong wooden " crochet " needle. 

 6. A Dissecting Case, but failing that, a pair of strong forceps, 



FIG. 4. Paper Tray to hold Slides. 



