292 



YERBENACE^. 



\Tectona. 



The weight may, therefore, for practical purposes, be taken approximately at 

 40 Ibs. per cubic foot, and the value of P. at 600, on an average. Molesworth, however, 

 in ' Graphic Diagrams for strength of teak beams ' gives : "Weight 45 Ibs., P = 800, 

 E = 5,000. Captain J. C. Dundas, V. C., R. E., in his report on experiments (see 

 above) made at Lucknow in 1877 and 1878 (Roorkee Professional Papers April 1879, 

 Vol. VIII, No. 32), in which he gives the weight at 34 Ibs., P = 470 and E. = 2,200 

 as an average, says that logs as received at Lucknow shew a weight of nearly 50 Ibs. 

 per cubic foot, but that after being well dried and sawn into scantlings, the weight 

 falls to 34 or 35 Ibs. His value for P. is a reliable one, for it is based on experiments 

 made with beams of the large size of 10 feet X 4 in. X 6 in. 



Teak wood does not split, crack, warp or alter its shape when once seasoned, it 

 does not suffer in contact with iron, and is rarely, if ever, attacked by white ants. 

 Its durability is probably due to the aromatic oil contained in the wood. 



It is the chief timber of India and Burma ; it is exported largely for ship-building 

 and the construction of railway carriages. In India it is used for all purposes of 

 house and ship -building, for bridges, sleepers, furniture, and most other purposes. 



The leaves give a red dye ; they are very large and are used as plates, for packing 

 and for thatching. The oil is extracted from the wood in Burma and is used medi- 

 cinally, as a substitute for linseed oil and as a varnish. 



Jagmandal Reserve, Central Provinces 

 Ahiri Reserve, Central Provinces 



C 1408. 

 C 1409. 



C 2933. Sonawani, Satpura Reserve, Central Provinces 



(Tree planted in 1867, cut down in 1876, 10-inch girth.) 



C 2983. (White Teak, DudJiia Sagun} 



<J 2982. (Black Telia Sagun or oil teak) 



C 2987. (Stone Pattharee Sagun.} 



Ibs. 

 38 



41 



48 

 44 



(Black Teak is rather darker coloured, but otherwise there is no difference in 

 structure, and very little in appearance between these three specimens.) 



C 834. Bairagarh Reserve, Berar 

 C 2809. Melghat, Berar (sap wood) . . 

 E 1202. Bamunpokri Plantation, Darjecling Terai, Bengal 

 Specimens from compartment I. 1 planted 1868 . 



II. 1 ,, 1871 . . 



Ibs. 

 46 

 38 



I. 3b 



1872 



