Plate I. 



THE CELLS. 



General Subject of the plate. What does fig. 1 represent ? Of what is it a 

 type? "Why? Name its organs. "What does flg. 2 represent? "Which the 

 vertical section ? The Transverse ? Meaning of Transverse. How different 

 from horizontal? "Why? Vertical, how does it differ from Longitudinal? 

 What part at a t What in the large white dots at top ? Name the successive 

 bundle.', beginning at a. What bundles of cells in the figure run in a vertical 

 direction ? "What lines in a transverse or horizontal direction ? Fig. 3, differ- 

 ence between it and fig. 13. "What other forms of the Duct ? Fig. 4. Fig. 5, a? a. 



What indicated by the arrows ? Fig. 6, explain the parts. Fig. 7, describe. 

 Figs. 8, 9 and 10, define. What does fig. 18 represent? The circular lines in 

 the transverse section. The straight lines in the vertical. The white grooves. 

 Fig. 19, the round spots. To what system do figs. 4, 5 and 7 belong ? What 

 figures belong exclusively to the vertical system ? What to both vertical and 

 horizontal? Which part to each ? What does flg. 14 represent? 15? Is fife. 

 16 a vegetable product ? 



