Plate VIII. 



WOOD, 



29 



General subject. What do figures 1, 2 and 8 represent? Define each. 

 What three principal parts in woody stems seen at fig. 8 ? Are all these parts 

 observed in fig. 6 ? How many ? Show the difference of structure ? Where 

 islhe new wood deposited in figures 4, 7, 8 and 9 ? Where in fig. 6 ? What 

 kirnl 6f stem's does each mode of growth produce? Describe fig. 5 fig. 7 fig. 

 in. What'tfoes fig. 9 represent? How many years old ? Why? Trace all the 

 different parts'in fie. 8, from a, the pith, outward. Show the line of cells from 

 which' the new wood' and bark are deposited. What figures are of Exogenous 

 wood? What of Endogenous? Describe figs. 4, 5. How many years old Is 

 the latter? Why? 



