104 



TRAXSAf'TIOXS AND PROCEEDINGS OF THE [Sess. lv. 



in a considerable number of the trees there appeared to be a 

 period of fluctuating results — slight increases alternating with 

 slight decreases — both before and after the period of reliable 

 increase. Whether these fluctuations were real, or were 

 simply due to errors of observation, may be doubted, and 

 further trials are necessary to settle the point. 



The numbers in the first column of this and subsequent 

 Tables are the numbers painted on the trees for identifi- 

 cation. 



Table I. — Periods of Girth-Increase in 1890. 



As the observations on the same trees in 1888 and 1889 

 were at fortniglitly intervals or more, and are consequently 

 less precise, it is unnecessary to give them at length, but it 

 may be stated that they confirm the results for 1890. I 

 give, however, the record of the start in girth-increase for 

 several other trees which were observed in 1888. 



*39. Cedrus africana, stavied Ijeiween April IGtli and April 30th. 

 6. Abies Douglasii, 



92. Abies Lowiana, 



71. Acer pseudoplataiuis, 



87. Popuhis fastigiata, 



23. Fraxinus excelsior, 

 *82. Petula alba, 



April 30th and May 14th. 

 >' )) jj 



>' J) )) 



May Utli and ^Nlay 31st. 



7. Fagus sylvatica, 



* Older trees than tlie otliers, but healthy, and ipiick growers. 



