other trees of nearly the same age (in which case the rate of growth in diameter was usually slower, although the height of the tree was probably greater). In short, any facts that appeared to be serviceable in the consideration of the question were noted and tabulated. The total number of trees included in the following table is twenty-nine. Of these Nos. 1 to 7 are cultivated trees, the date of planting of which is accurately known. The number of annual rings given for these specimens is the number of years since they were planted, plus three, the estimated age when planted. The rings have been actually counted in a sector of the stem in the remaïning twenty-two; and with the exception of No. 9, which is taken from Mr. Laslett's book, “Timber and Timber-trees” (p. 45), and the last four (Nos. 26 to 29), for which I am indebted to the kindness of Mr. W. A. Nisbet, the countings have been taken by myself. I have, however, to thank my friends Mr. J. Stewart, Mr. T. Herbert, and Mr. C. Spencer for kind assistance with several sections. Table showing the Annual Rings of Growth and their Average to the Radius of certain Sections of Kauri-trees of given Diameter. No. Diameter of Tree. Number of Annual Rings. Average Number of Rings for Each Inch of Radius. Locahty. Authority Ft m. 1 0 8·6 25 5·8 Auckland Domain J. Baber. 2 0 10·6 43 8·1 Parawai, Thames J. W. Hall. 3 0 7·6 43 11·3 " " " 4 0 9·0 43 9·5 " " " 5 0 8·6 38 8·9 " " " 6 0 5·6 38 13·5 " " " 7 0 10·3 26 5·1 Remuera Hon.E.Mitchelson. 8 1 0 42 7·0 Auckland Domain J. Stewart. 9 2 0 161 13·4 (?) T. Laslett. 10 11 0 476 7·2 Waitakerei T. Herbert and T.F.C. 11 4 4 213 8·2 " " 12 5 0 280 9·3 " " 13 5 7 270 8·1 " " 14 8 0 455 9·4 Mangawai J. Stewart and T.F.C. 15 4 0 188 7·8 Whangarei T.F.C. 16 5 6 280 8·5 Coromandel " 17 7 7 448 9·8 Waitakerei C. Spencer and T.F.C. 18 5 11 320 9·0 " " 19 4 2 195 7·8 " " 20 3 8 153 7·0 " " 21 3 3 158 8·1 " T.F.C. 22 3 10 197 8·5 " " 23 7 5 352 7·9 " " 24 4 1 220 9·0 " " 25 3 1 241 13·0 " " 26 3 1 353 19·0 Near Paeroa W.A.Nisbet. 27 6 3 545 14·5 " " 28 7 8 627 13·6 " " 29 8 4 705 14·0 " " Total 282·3 Average 9·7