Tree Measurements at San Jorge, Uruguay. 459 



The period of least growth iu all the species was in the 

 three winter months— June, July, and August ; the total 

 amount for these three mouths varying in the different 

 species from 9 per cent, to 19 per cent. 



On the other hand, the period of greatest activity occurred 

 at very different times in the different species. Generally, 

 it was for three or four months in spring and up to mid- 

 summer ; but Eucalyptus was most active for the four 

 months after midsummer, when they grew 40 per cent, of 

 the general increase. The Acacia mollissima was the only 

 species in which there was a regular rise and fall in the 

 girth-increase throughout the year. The Euccdypti rose and 

 fell to two extremes, one in September and one in March and 

 April. The pines attained their maximum (16 per cent.) 

 quite suddenly in September ( = English March), and fell 

 gradually till the middle of autumn, when there was a shght 

 increase. The Acacia melanoxylon was very irregular. 



Table No. II. — Montldy Increase in Girth and Percentage of 

 Increase for each Month, in eight Deciduous Trees, between ^^ 

 and 15 years of a/ie, for five years, from \Wi January 1885 to 

 \'2th January 1890. 



Table No. II. represents eight deciduous trees under the 

 same conditions, averages, percentages, &c. Each species 



