ADDENDUM. 



After the paragraph ending " the parts of a branch 

 below the ring would be more favourably situated 

 for it than the parts above the ring," page 49, 

 second line from bottom, add, 



A slight deposit of new growth may be 

 observed on the lower scar or lip of the 

 wound of a branch which has been rung. 

 This, I imagine, should be attributed to 

 the descending sap already in the bark. 

 And, from the same cause probably, if the 

 branchless stem of a young larch tree is 

 sawed across at the height of a foot from 

 the ground in the spring, granulations of 

 new growth, and a slight new deposit, will 

 be formed around the stem, between the 

 bark and the wood, during the summer. 

 I at first mistook this new growth for a 

 deposit from the upward sap ; but after 

 the first summer the new growth around a 

 stem which cannot throw out branches 

 ceases, and the stem dies. The death of 



H 2 



