CHOOSING TIMBER AND MEANS OF TRANSPORT. 
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I N choosing timber for building purposesit is always 
difficult to find something suitable. This depends in the 
first instance on the technical conditions which the build- 
ing in question requires and on the local conditions 
which influence the price of the timber, namely the dis- 
tance to the place from where the timber can be procured 
and the quality of the timber available, further the means 
of transport, either by rafts or by dragging it out by 
elephants or buffaloes or conveying it in buffalee or bullock 
carts. The technical conditions to be observed are 
strength, elasticity and weight of the wood. For bridges 
a very hard timber with a high co-efficient of transverse 
strength is used; for example Mai Deng, Teng, Rang. Maka. 
For temporary building a soft wood such as Mai Yang, 
Tabek or Kwao is taken, whereas for sleepers good heavy 
