GROWTH OF WOOD IN DECIDUOUS AND EVERGREEN TREES. 



53 



August and September, trifling though they were, all indicated an increase, it is 

 probable that a slight and altogether immaterial growth did occur. Measure- 

 ments kindly made for me by Mr Sadler in 1882 to test this question further 



Table V. — Monthly Increase in Girth of Eighteen Evergreen Trees in the Botanic 

 Garden, Arboretum, and at Craigiehall in 1882. 









Increments in hundredths of an 



inch. 



No. 



Trees. 



Girth 31st 

 March. 

























May. 



June. 



July. 



August. 







Inches. 











25 



Sequoia, 



27-55 



•25 



•30 



•10 



•05 



27 



t) ..... 



30-65 



•45 



•65 



•20 



•10 



1 



jj i . . • • 



25-10 



•75 



•65 



•25 



•10 



2 



,, . . . . . 



29-70 



•55 



•55 



•40 



•15 



29 



Deodar, 



28-70 



•10 



■20 



•30 



•35 



30 



,, ... ■ • 



66-45 



•00 



•20 



•30 



•20 



34 



Araucaria, . • 



20-25 



•25 



•10 



•05 



•05 



35 



j) . . • • . 



22-95 



•45 



•10 



•15 



•15 



4 



„ Craigiehall, 



19-85 



•25 



■25 



•10 



•10 



31 



Picea Lowei, .... 



19-95 



•45 



•20 



•20 



•20 



5 



Douglas pine, . 



58-20 



•15 



•25 



•10 



05 



2 



Austrian pine, Craigiehall, . 



21-55 



•65 



•40 



•20 



•30 



39 



African cedar . . . 



33-75 



•35 



•40 



•40 



•45 



1 



Cypress, Craigiehall, . 



17-00 



•35 



•25 



•20 



•05 



41 



Yew, 



69-65 



•10 



•15 



•10 



•15 



48 



M 



38-90 



•15 



•15 



•20 



•05 



49 



,, . ... 



24-60 



•20 



•10 



•15 



•10 



53 



,, ..... 



32-50 



•20 



•00 



•05 



•15 



Aver 



age of 18 trees, .... 





•31 



•27 



•19 



•15 





4 Sequoias, 



. . . 



•50 



•53 



•24 



•10 





3 Araucarias, . 





•31 



•15 



•10 



•10 





4 Yews, .... 





•16 



•10 



•12 



•11 





2 Deodars, 





•05 



•20 



•30 



•27 



Monl 



My percentage of 18 trees, . 





34 



29 



2-1 



16 





4 Sequoias, . 





36 



39 



28 



7 





3 Araucarias,. 





47 



23 



15 



15 





4 Yews, 



. . . 



33 



20 



25 



22 





2 Deodars, 





6 



24 



37 



35 



proved unfortunately unavailable, owing to inaccuracies in the tape used. But 

 as the increment for August and September combined was less than in the two 

 previous years, it is fair to conclude that there could have been no material 

 growth in the latter month. 



1, b. The Months to which Growth of Wood is confined in Evergreen Trees. 



From the monthly measurements in 1880 of the six originally selected trees, 

 Sir Robert concluded that the evergreen class begins to increase materially in girth 



VOL. XXXII. PART I. I 



