464 



Mr Charles E. Hall on 



tree-growth; but this five-year term seems favourable for 

 the purpose of investigating this subject, as rainfall especially 

 has varied greatly during the term, two years being con- 

 siderably under and one year over the average of rainfall. 



The deciduous trees seem to begin their sleeping season 

 about the middle of April, and on May 12th show an actual 

 decrease from their girth of April 12th. Table No. VI. refers 



Table No. VI. — Increase or Decrease of hvelve Deciduous Trees for 

 Monti IS of May and June. 



The five Mays thus show a total decrease of 71 millimetres, or say, 2| English 

 inches ; and the five Junes a total increase of 45 millimetres, or say, If English 

 inches — equalling thus a nett loss of 26 millimetres, or 1 English inch. 



Note that the loss is incurred from measurement day, April 12, to next measure- 

 ment day, May 12, and the gain from that day to June 12. 



to the increase and decrease of twelve deciduous trees for the 

 months of May and June, say from April 12 to June 12; the 

 total decrease of twelve trees in five Mays amounting to 

 71 millimetres, or say 2f English inches, and there is a total 

 increase on these trees in five Junes of 45 millimetres, or 

 1^ English inches. This is shown in the column headed 

 " Results." 



Table No. VII. refers to the increase and decrease of three 

 older deciduous trees, from April 12 to October 12, for five 

 years. These three trees show a marked decrease in their 

 measurements on May 12, an increase in June, again a 



