72 TIMBER AND TIMBER TREES. [cHapP. 
the conditions being that the measurement of rough 
timber for payment is to be regulated by the stops or 
joggles. Every piece to be measured for contents by 
calliper measurement, as far as the spire will hold 
12 inches in diameter. No tops to be received, except 
the spire and such other top or limb as may be grown 
on the main piece, of a substance and length to admit 
of being converted with it. Such other top or limb 
will be measured for contents as far as it will hold 
Fic. 16a. 
Wy NAS 
AA Nii UU 
FIG. 162, 
12 inches in diameter. If, however, the professional 
officers of the yards are of opinion that the conversion 
of the main piece will be improved thereby, tops, 
including the spire, will be measured for contents as 
far as they will hold 9 inches in diameter; but, in such 
case, two-thirds only of the contents below 12 inches 
in diameter will be added to the other contents of the 
piece for payment. All the rough timber to be so 
hewn or squared that no part of the surface or square 
