july sept. 1857.] Preservation of Timber. 



SOS 



The latter, indeed, is the private property of E. 



Jflclc trees 



Nutmeg do. B. Thomas, Esq., Collector of Coimbatore, but 



Allspice do.* ^ rom kis zea * in Arboriculture, and great libera- 



Cocoa m ° n tr do S ' lity t0 a11 a PP licants > its usefulness for dissemi- 



Vanilla creeper. nating Tropical products is almost as great as if 



Peach trees. . ° 



Orange do. it were public property. In the margin, I annex 



Pumplemoss' trees. a list °f tne Fruit trees, Aromatic shrubs, &c. 

 MTnX d steen ViDe ' now cultlvated in this rich bl *t confined nook, in 

 Ptose apple. which the Cocoa tree, Nutmeg, Allspice, &c, 



Loquat. . 



Pine apple. have succeeded admirably, and from which it is 



the hope of Mr. Thomas, that they may be ex- 

 tensively spread over congenial climates, such as the Wynaad and 

 other parts of Malabar. — Memorandum on the Government Garden 

 of Ootacamund by H. Cleghokn, Svpt. Botanical Gardens. 



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 the 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. 



