3 I2 



REPORT OF THE FOREST, FISH AND GAME COMMISSIONER. 



normally elapsing between successive seed years. Since a single seed year 

 is rarely sufficient to secure a complete stand of seedlings, a wood raised 

 by natural seed regeneration is usually composed of two, three or more 

 age classes appearing in mixture and forming distinct aggregates. 



Where the rotation comprises ioo years, and where the period of 

 regeneration comprises twenty years, and where seed years occur ever)- five 

 years, there a " normal gradation of age classes " contains, in the fall suc- 

 ceeding a seed year, the following aggregate of age classes: 



Youngest aggregate .... 

 Second .... 



Third " .... 



Fourth " . . . ' . 



Oldest " .... 



Or the following aggregates: 

 Youngest aggregate . 

 Second 

 Third 

 Fourth 

 Oldest 



Or the following aggregates: 

 Youngest aggregate .... 

 Second " .... 



Third " .... 



Fourth " .... 



Oldest " .... 



Or the following aggregates: 

 Youngest aggregate .... 

 Second .... 



Third " .... 



Fourth " . ... 



Oldest " .... 



I 



6 



11 



and 



16 



years 



old 



21 



26 



3i 



u 



36 



tt 



a 



41 



46 



5i 



u 



56 



a 





6l 



66 



7i 



it 



76 



u 



.. 



8l 



86 



9i 



tt 



96 



" 



tt 



6 



11 



16 



and 



21 



years 



old 



26 



3 1 



36 



tt 



41 



a 



tt 



46 



5i 



56 



a 



61 



tt 



it 



66 



7i 



76 



" 



81 



a 



a 



86 



9i 



96 





COI 



tt 



it 



11 



16 



21 



and 



26 



years 



old 



3i 



36 



4i 



" 



46 



" 



tt 



5i 



56 



61 



" 



66 



it 



a 



7i 



76 



81 



u 



86 



a 



tt 



9 1 



96 



IOI 





:o6 



it 



u 



16 



21 



26 



and 



3i 



years 



old 



36 



4i 



46 



" 



5i 



a 



" 



56 



61 



66 



" 



7i 



a 



a 



76 



81 



86 



" 



9i 



tt 



" 



96 



101 



106 



ti 



lacking 





Amongst all age classes under twenty-one years old, some mother 

 trees are still at hand up to no years old; and beneath all age classes over 

 ninety years old, some seedlings are found up to twenty years old. 



In the ideal selection forest, all age classes are represented on every 

 acre of ground. 



