48 



HISTOLOGY OF MEDICINAL PLANTS 



number, and the box, the tray or cabinet number. For 

 example : 



Powdered Arnica Flowers 

 No. 80 — Box A — 600. 



PRESERVATION OF MOUNTED SPECIMENS 



Accurately mounted, labeled, and ringed slides should be 

 filed away for future study and reference. Such filing may 



Fig. 52. — Slide Box 



Fig. 53. — Slide Tray 



be done in slide boxes, in slide trays, or in cabinets. Slide 

 boxes are to be had of a holding capacity varying from one to 



