180 



THE INCREMENT. 



the same degree as, with the advancing age of the wood, they 

 lose their dominant character and join the secondary part of 

 the growing stock.. Exceptions to this may occur, which have 

 been explained in Volume II. 



The progress of the increment in whole woods has by no 



400 



AGK, IN YEARS. 

 Fig. 41. — Diagram sbowing the Current Aiiuual Iiurcnieut. 



means been determined for all important species, though 

 much material bearing on this question has l)een collected 

 of late years on the continent of Europe. In India, matters 

 are still more backward. 



The data on page 179 refer to European species, taken from 

 woods growing on land of good productive power. They give the 

 total pruductiun of timber and luewuud in full} stocked woods. 



