JULY— SEPT. 1857.] Prcsercation of Timber. 
SOS 
The latter, indeed, 13 the private property of E. 
B. Thomas, Esq., Collector of Coimbatore, but 
from his zeal in Arboriculture, and great libera- 
lity to all applicants, its usefulness for dissemi- 
nating Tropical products is almost as great as if 
it were public property. In the margin, I annex 
a list of the Fruit trees, Aromatic shrubs, &c. 
now cultivated in this rich but confined nook, in 
which the Cocoa tree, *Nutmeg, Allspice, &c., 
have succeeded admirably, and from which it is 
» the hope of Mr. Thomas, that they may be ex- 
tensively spread o *cv congenial climates, such as the Wynaad and 
other parts of Malabar. — Me^norandum on the Government Garden 
of Ootacamwid by H. Cleghoen, Svpt, Botanical Gardens. 
Jack trees. 
Nutmeg do. 
Clove do. 
Allspice do. 
Cinnamon trees. 
Cocoa do. 
Vanilla creeper. 
Peach trees. 
Orange do. 
Lime do. 
Pumplemoss trees. 
Grenadilla Vine. 
Mangostccn. 
Hose apple. 
Loquat. 
Pine apple. 
Preservation of Timber. 
The Permanent Way Company, 26 Great George Street, West- 
minster, are employing with success Dr. Boucherie's method of 
preserving timber. Solutions of preservative substances are in- 
troduced by the patent process into various kinds of timber, in 
such a way as to expel the fermentescible sap, and substitute mat- 
ter less liable to undergo destructive changes. It has been found 
that sulphate of copper, dissolved in the proportion of at least 2J 
lbs. to 22 gallons of water, is the best preservative. It is said 
that white pine thus impregnated with sulphate of copper, placed 
in the ground as railway sleepers, or exposed to the action of the 
air, lasts longer than oak unprepared placed in the same situa- 
tions. The Directors of the Chemin de Fer du Nord state, that 
Dr. Boucherie's process has produced most satisfactory results as 
regards sleepers when completely prepared. Those in use since # 
1846 were as good in 1855 as when laid down. The sleepers are 
Beech, Hornbeam, Birch, and Pine. The posts for tiie telegra- 
phic wires prepared by this process, have also shown great dura- 
bility. The process thus appears to impart durability to woods 
which are cheap and abundant. — Edinburgh Philosophical Journal, 
April 1857. 
