58 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY. 



Supplementary Work in Private Woodlands. 



As the woods under the immediate control of the college do 

 not provide examples of all different stages and conditions of 

 forest growth, they have to be supplemented, for demonstration 

 purposes, by private woodlands in the vicinity, to which latter 

 the landowners concerned have readily granted access. For 

 these purposes the conifer tract on Tyneside is second to none 

 in the country. 



Plots have also been set out by Armstrong College for 

 observation purposes in these woods. The following two 

 examples show the nature of some of the growth studies 

 which are being made. The observations were commenced 

 by Mr A. C. Forbes six years ago, and re-measurements have 

 been made fron^ time to time since then, and other new 

 plots taken up. 



Extract from particulars of a Series of Measurements made in 

 Observation Plots on Tyneside {Dipton Woods). 



lO 



No. 

 Date of 

 Plot 



1905 



Area 

 of Plot 

 meas- 

 ured 



Age in years 



at time of 

 Measurement 



19IO 



> 



< 



Number of 

 Stems 



each 

 Plot 



1st measure- 

 ment 

 at 30 years 



2nd measure- 

 ment 

 at 35 years 



Ft. 

 35 



38 



1073 



930 



II. 



\ acre 



1st measure- 

 ment 

 at 30 years 



2nd measure- 

 ment 

 at 35 years 



34 



37 



per 

 acre 



510 



450 



1073 



930 



rt CJ o 



2040 



1800 



Sq. ft. 

 128-9 



147-3 





Equal per acre 



;2'6 



45-3 



C.ft. 

 1718 



2149 



C. ft. 



1718 



2149 





C. ft, 



57 

 61 



< u 



1 hinnings 



removed at 



35 years 



= per acre 



420'6 



524*0 



1668 



2096 



c. ft 



86 



56 



60 





85 



143 



240 



NoTE.—1)^Q measurements are taken over bark. To make allowance for bark 

 I li % or 12 % should be deducted from the volume figures given above. 



