82 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY. 



done in the production of useful timber of different varieties at 

 the higher altitudes in Scotland. 



Messrs Alex. Jack & Co., Ltd., Maybole, show a choice 

 representative set of wheel woods, comprising ash felloes, elm 

 naves, and oak spokes, all of different patterns and sizes, as 

 used in the manufacture of their carts, vans, and lorries, etc. 

 The timber was grown in the vicinity of Maybole, and is of 

 first-class quality. The various articles are well finished, and 

 the whole forms an instructive industrial exhibit. 



Mr F. R. S. Balfour of Dawyck sends a section of bark and 

 a piece of board cut from a Sequoia gigantea, in the Giant 

 Forest, Sierra Nevada, California. Also two very large sections 

 of Douglas fir from British Columbia, measuring about lo feet 

 in diameter. 



Messrs J, & M. Smith, Peebles, send a fine set of mounted 

 veneers, showing splendid marking and quality, and also two 

 good specimens of " burred " oak. 



The Duke of Roxburghe, Floors Castle, exhibits a splendid 

 stand of specimens, illustrating the growth of larch at 

 elevations varying from 50 feet to 1000 feet above sea-level. 

 The sections are staged so as to revolve, and are cut 

 longitudinally through the centre in 5 feet lengths. One 

 example is given for every 50 feet rise up to the 1000 feet. 

 The quality is in all cases excellent, and the exhibit has attracted 

 the notice of visitors generally. 



The Duke of Northumberland, Alnwick Castle, sends a most 

 interesting series, showing the gradual evolution of a Scots fir 

 crop. We have, first, examples of stems taken from plantations 

 20 years old, No. i planted at 3 feet apart, No. 2 planted 

 at 4 feet apart, illustrating the difference in branch suppression ; 

 also boards and diagrams giving the quality of timber which 

 may be expected from crops planted at these distances. The 

 3 feet apart crop give decidedly the best results. Full length 

 specimen stems from a plantation 30 years old are also shown • 

 these give a volume of 1741 cubic feet per acre, or an 

 annual average increment of 58 cubic feet on a total of 1684 

 stems. The exhibit is further supplemented by transverse and 

 longitudinal sections of a mature tree 115 years old. The trees 

 stood 420 to the acre, and measured 8100 cubic feet. A 

 section of a spruce tree 45 years old, from a wood now con- 

 taining 632 trees per acre, with content of 6000 cubic feet, is 



