PRACTICAL HISTOLOGY. 



PART I. 



I. APPARATUS REQUIRED. 



THE student of Practical Histology must be provided with the 

 following apparatus: 



1. A Compound Achromatic Microscope capable of magnify- 

 ing from about 50 to 300 or 450 diameters linear. 



2. Glass Slides. The most convenient size is 3 inches by i 

 inch (or 76 x 26 mm.), with ground edges made of the best 

 flatted crown-glass. About two gross will be required (fig. i). 



76X26 M 



FIG. i. English form of Slide. 



It is convenient to have two dozen or so of a larger size, 3 inches 

 by j inches. 



3. Cover-Glasses. Some are square and others circular (fig. 2). 



JflG. 2. Square and Round Cover-Glasses, showing the most convenient sizes. 



The student should be provided with both sorts. Keep the square 

 ones for balsam preparations, and the circles for those that roquire 



2 



