86 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY. 



young naturally produced seedlings of Thuya gigantea and 

 Douglas fir in pots, lifted from a plantation showing some 

 natural regeneration. 



Class 2. — Specimens illustrating t/ie rate of growth of trees 



The Marquess of Ailsa, (Julzean, Maybole, showed specimens 

 of young trees, including some of the rarer conifers, illustrating 

 the rate of growth in the nursery, and small stems of Sitka spruce 

 showing a very fast rate of growth, also a cross section of Abies 

 grandis. 



Lochiel, Achnacarry, sent a very interesting collection of 

 specimens of split stobs from natural-grown oak ; specimen of 

 larch, 27 years old, grown at a high elevation on peaty soil 

 overlying mountain clay ; cross section of well-grown larch, 68 

 years old, height 75 feet, diameter at 53 feet, 6 inches; specimen 

 of Scots fir, 28 years old, grown on unsuitable soil at an elevation 

 of 700 feet, in an exposed situation ; section of larch from a 

 closely-grown plantation, showing how the annual increment is 

 restricted for want of room, height 65 feet 6 inches, diameter at 

 40 feet, 3 inches, age 39 years; section of larch grown in a 

 mixed plantation, on pure peat 7^ feet deep — this specimen 

 shows rapid growth but the timber is of very indifferent quality; 

 section of self-sown larch showing a slow rate of growth until the 

 roots get into suitable soil and rapid growth thereafter ; section 

 of larch planted on unsuitable surface soil, showing a slow rate of 

 growth until the root-system gets properly established, and more 

 rapid growth thereafter; section of larch, 39 years of age, from 

 an experimental plot where the trees are still standing 3 feet 

 apart, total height of specimen 64 feet ; also a section of natural- 

 grown oak from a closely-grown wood. 



The Earl of Strathmore, (ilamis, Forfar, sent transverse 

 sections of Douglas fir, larch and silver fir. 



The Earl of Minto, Minto, Hawick, sent a cross section of 

 larch, 140 years old, 85 feet high and 2>\ ^^^^ diameter, con- 

 taining about 280 cubic feet of timber, and showing very 

 red heartwood and a very narrow sapwood. 



Cross sections of Thuya gigantea, Douglas fir, Sequoia gigantea, 

 Sequoia senipervirens and Cupressus lawsoniatia were exhibited 

 by H. J. Younger, Estj. of Benmore, illustrating the great in- 

 crease in growth that results from heavily thinning a plantation. 



The Marquess of Graham, Brodick Castle, Arran, exhibited 

 cross section of larch 128 years old. 



