GROWTH OF WOOD IN DECIDUOUS AND EVERGREEN TREES. 



47 



increments are computed on the average increase per tree in the different 

 classes. For the sake of clearness it has also been judged advisable to divide 

 the table into two parts, the first comprising the twenty-eight deciduous and 

 the second the twenty-three evergreen trees under observation. 



I have ascertained that the results obtained from this new list do not differ 

 materially from those derived from the former list by Sir Eobert. But as it 

 would be useless to cumber these pages with more than one set of observations, 

 I have resolved to give the results of the new list alone, as being both more 

 reliable when corrected so as to apply to the past, and forming a more accurate 

 basis for the future. 



Table I. — Annual Increase in Girth of Deciduous Trees, 

 All in the Botanic Garden or Arboretum, except tlvose marked " Craigiehall." 













Increase. 







Trees. 



Date and Girth 

 when first measured. 





























1878. 



1879. 



1880. 



1881. 



1882. 







Inches. 



Inches. 



Inches. 



Inches. 



Inches. 



Inches. 



Birch, . 



1878 



55-35 



0-25 



0-05 



0-05 



o-io 



o-io 



„ (Craigiehall), 



1880 



56-30 







0-40 



0-55 



0-45 



Beech, , 



1878 



71-40 



1-20 



095 



0-65 



0-85 



1-15 



JJ • ■ • 



• )) 



60-50 



1-20 



0-80 



0-90 



0-90 



1-10 



,j . . . 



► )) 



75-80 



0-60 



0-60 



0-25 



0-50 



0-60 



>i 



• )> 



60-30 



0-60 



0-45 



0-15 



0-50 



0-50 



„ (Craigiehall), 



1880 



135-00 





• . . 



0-50 



0-65 



0-60 



>> >> • 



1878 



116-35 



6-80 



0-60 



040 



0-35 



0-65 



j, jj * 



' >> 



6175 



0-60 



0-30 



0-50 



0-50 



0-70 



>j jj 



■ J) 



71-85 



0-70 



0-50 



0-55 



0-65 



0-85 



Lime, . 



1878 



76-10 



0-50 



0-15 



o-oo 



0-65 



0-55 



j> • • 



» 



42-70 



0-70 



0-40 



015 



0-25 



0.40 



„ (Craigiehall), 



■ >) 



99-65 



0-20 



0-15 



o-io 



0-25 



0-35 



Sweet chestnut, . 



» 



70-80 



1-10 



0-90 



0-85 



1-10 



0-90 



Tulip tree, . 



» 



75-70 



1-00 



040 



0-30 



0-55 



0-50 



Horse chestnut, . 



i> 



48-75 



0-75 



0-50 



0-35 



0-70 



o-io 



Hawthorn, . 



)> 



38-00 



0-80 



o-io 



0-75 



0-35 



0-65 



Flowering ash, 



>) 



75-30 



0-60 



040 



0-30 



0-75 



0-50 



Sycamore, 



» 



58-60 



0-50 



0-20 



0-15 



0-30 



040 



English oak (Craigiehall 



)« 



69-45 



0-65 



0-50 



0-20 



0-35 



0-35 



Turkey oak, „ 



1880 



73-00 







0-70 



1-25 



0-90 



jj j; • 



1878 



41-90 



6-60 



0-65 



0-35 



0-60 



0-65 



American oak, 



yj 



30-80 



0-50 



0-40 



030 



0-30 



0-40 



Hungary oak, 



>> 



23-60 



1-80 



1-70 



1-40 



1-85 



1-85 



jj jj • 



1880 



1645 







1-10 



1-60 



1-90. 



jj jj • • 



J) 



13-50 







110 



1-70 



1-50 



Hornbeam, . 



Total increase of 22 tre 



1878 



44-50 



6-40 



0-35 



010 



0-55 



0-50 



es 















first marked in 1878, 







15-05 



11-05 



8-75 



12-90 



13-75 



Average per tree, 







0-68 



0-50 



0-40 



0-58 



0-62 



The same, with 5 addi 



3d 















in 1880, . 



. . . 





. • t 





12-55 



18-65 



19-10 



Average per tree, 



... 







... 



0-46 



0-69 



0-71 



