80. 
MEASURING TIMBER. 
Amongst the Siamese and the Chinese sawn wood is 
measured by the Yok. A Yok is a square measure 16 
wah long by one Sok equivalent to 16 qm. 
+ Kabiet = 1 niew. 
25 Niew = 1 Sok or 50 cm. 
4+ Sok aa 1 Wah or 2 m. 
In measuring the length 3/4th Sok of the remainder 
are counted a full Sok. The price per Yok varies accord- 
ing to the thickness of the planks, vizi—there are Yoks 
of four Kabiet, two niew, etc. 
Logs are measured by the Wah and Kam. 3/4th Sok. 
of the remainder equalsa full wah. A lesser portion than 
this is in the favour of the buyer. 
1 Kam=2I1 cm. of the circumference. 
TO FIND THE CUBIC CONTENTS OF A LOG, calculate the 
Square area of the log in the middle according to the 
formula : 
r? 3.1416 (radius squared and multiplied by 3.1416) 
and multiply this by the length of the log. 
OR G =I/4th girth of a tree in the middle. 
g=—l/4th ,, » 4 ON One end, 
g'= Ifdth .,, » » on the other end. 
L= Length of Log. 
c= Cubic contents of Log: C=L( G+g4+g"' )? 
3 
An allowance must be made for the bark. 
To find the diameter of a log, measure the 
girth in the middle and multiply by 3.1416. 
