269 



R. Indicates the tapping of tree No. 2 which was intermediate 

 between spiral and long oblique, practised on it in the 

 years 1906, 1909, 1912 and 1913. 



S. Indicates the true spiral tapping done on several trees in 

 1906. 



Numerals after these letters denote the modifications of the 

 experimental tapping to which the trees were submitted. 



Vowels are used to denote the odd tappings which were done 

 from time to time irrespective of any rotation, thus : — 



A. Denotes tappings done before 1904. 



E. Denotes tappings done by Mr. Ridley in 1905. 



O. Denotes tappings done by Mr. Burgess in 1905. 



U. Denotes an (apparently mistaken) tapping done in 1905 

 on twenty trees. 



V. Denotes a single basal line cut in 1907. 



W. Denotes a pair of these cuts at the same time. 



Z. Denotes a mistaken tapping of a few trees done in 1909. 



Q. Denotes the tapping of trees in block 2 in 1913. 



In cases where a tree was not subjected to one of the rotation 

 treatments from the very beginning, a small letter instead of a 

 capital letter is used to denote its treatment, thus "b from 1906" 

 means that the tree received treatment B from the year 1906: thea 

 " Ab from 1906 " means that it was tapped before 1904 (A) and 

 that it was put into rotation B in 1906 to make up the number of 

 trees : OWMI, means that the tree was tapped by Mi. Burgess in 1905 

 (O), by two basal cuts by Mr. Boden Kloss in 1907 (W), and was 

 put into "experiment 8" (M) by Mr. Derry in 1909 being one of 

 the trees tapped by a half herring-bone (Ml). 



The total number of tappings under the different treatments 

 comes out at a small number with regard to the days which elapsed 

 between July 4th, 1904 and March 14th, 1914, when the old order of 

 tapping was abandoned, /. e., 3650 ; that is to say it was light treatment 

 an regards removal of latex, but up to 1906 it was associated with 

 considerable damage to the cambium in consequence of the nature of 

 the tools used in tapping. All trees with the vowel A, E and O in 

 their symbol are likely to have suffered from other injurious cutting. 

 But such cutting is not associated with the later consonants of the 

 alphabet M, N, P, Q, R, S and Z. But it is associated for two years- 

 with the earlier letters B, C, D, F, G, J, K and L. 



