50 



METHODS OF STUDY. 



Study of the Transection of the Anther of Begonia. 



Aiither cavity containing pollen mother 



cells. 

 Mother cells with young pollen grains. 



Empty anther cavity. 



Parenchyma cells of the interior of the 

 anther. 



Fibro-vascular bundle extending along 

 the center of the anther. 



Epidermis of the anther. 



Fig. 5. Sample page of a drawing; book. 



The notes and explanations which accompany the drawings 

 may be kept on separate sheets or pages in the drawing book. 



Preservation of Slides. 



To the person who makes a collection of microscopic slides, it 

 becomes a matter of no little importance as to how they should be 

 arranged in order that they may be best preserved and at the same 

 time available for instant reference. Many kinds of cabinets may 

 be purchased of dealers, but the large ones are quite expensive and 

 beyond the means of many. A vei-y inexpensive way to preserve 

 the preparations is in mailing boxes, which hold 25 slides. These 

 can be filed away but should be kept on end to prevent displace- 

 ment of the mount. After a time, however, the number of boxes 

 accumulates so as to become burdensome ; and furthermore, it is 

 better for slides to be supported from below on each side of the 



