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METHODS IN PLANT HISTOLOGY 



paticae Anthocerotales. It will readily be seen that the process can be 

 continued almost indefinitely, and that new slides may be at any time 

 dropped into their proper places. A rather complete label gradually 

 built up in this way is shown in Figure 140. 



Fig. 140. — Label for slide box 



Since there should be some system in the classification, we should 

 recommend the Engler-Gilg Syllabus der Pflanzenfamilien. 



The beginner will often find that the mere placing of a slide in the 

 proper box and the box in its proper place on the shelf will refresh or 

 increase his knowledge of classification. 



