Plate VIII. 



WOOD. 



29 



General subject What do flgnres 1, 2 and 3 represent? Defliia each. 

 What three principal parts in woody stems seen at flg. 8 ! Are all these parts 

 observed in fig. 6 1 How many ? Show the difference of structare ? Where 

 is the new wood deposited in flgnres 4, 7, 8 and 9 ? Where in flg. 6 ? What 

 kind of stems does each mode of growth produce f Describe fig. 5— flg. T— fig. 

 10. What does fig. 9 represent ? How many years old ? Why ? Trace all the- 

 different parts in flg. 8, from ff, the pith, outward. Show the line of colls from 

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

 wood! What of Endogenous? Describe flgs. 4, 5. How many years old is 

 tho latter? Why? 



