322 TRANSACTIONS AND PROCEEDINGS OF [Sess. lvi. 



April. The annual average numltcr ol: trees which 

 yielded no increase in this mouth was eight in the twenty, a 

 much smaller proportion than the twenty-one in thirty of the 

 Deciduous group. O'lO was reached thirteen times, 015 six 

 times, and 0'20 once. No less than seven of these twenty com- 

 paratively large amounts were due to three trees of Pinus 

 cxcelsa. Of single trees, Thuja gifjantca twice yielded 015, 

 Abies grandis figures with 015 and 0*20, and Edinospora 

 twice with 010. Thus a stronger tendency is apparently 

 shown to a comparatively large April growth in some 

 species than in others. The incidence of these larger 

 amounts in the different years was very various. In 1887 

 no example occurred, in 1888 one, in 1891 two, in 1890 

 eight, in 1889 nine. 



The total amounts for April were 0*55 in 1887, 075 in 

 1888, 1-40 in 1889, 1-20 in 1890, and 0-45 in 1891. 



May. The annual average number of trees yielding 

 either O'OO or 0"05 was only about three in twenty, con- 

 trasted with twelve in thirty of the Deciduous group. An 

 increase of 0*?>0 or upwards was reached twenty-eight times 

 among the twenty trees in live years, Ahics Loiviana 

 appropriating seven of the twenty-eight. 0*40 and upwards 

 was attained six times, five of them by A. Loiviana, and it 

 alone reached half an inch. 



The total amounts were 4-90 in 1887, 4-85 in 1888, 

 4-50 in 1889, 3-90 in 1890, and 215 in 189 J. 



June, Iiccords of 000 or 0-05 occur only seven times ; 

 of 0*30 and upwards twenty-four times, and in only seven 

 of the thirteen species ; eight tinges in Larix ; seven in Ah. 

 LovAana ; four in P. cxcelsa ; twice in Araucaria ; once in 

 Ah. Hooheriana, Ah. Dov/)lasii, and Thuja girjantea. In- 

 creases of 0-50 and O'GO in Lario^,, and of 0-50 in Ah. Loioi- 

 ana, were recorded. Xo other species reached half an 

 inch. 



The total amounts were 4-75 in 1887, 415 in 1888, 

 3-70 in 1889, 455 in 1890^ and 4-45 in 1891. 



July. Kecords of O'OO or 0-05 occur fifteen times; of 

 0'30 and upwards fifteen times, in five species — five times iu 

 Ijarix, four in P. cxcelsa, three in Ah. Lovnana, twice iu 

 Ah. grandis, and once in Ah. Doaglasii. 015 in Larix 

 was the greatest amount in tliis month. 



