Page:Timber and Timber Trees, Native and Foreign.djvu/94

74 added thereto; to be fairly sided from end to end, parallel, and to be measured for contents as far as it holds, at the top end, on each side, between the wanes, three-fourths of the siding of the piece. The pane at the top is to determine the length of the piece; but if the length of the sides be not equal, the mean is to be taken. The timber to be so hewn upon the moulding edges that the surface of the square shall not be less than one-fourth the diameter of the piece. The timber to be measured for contents at the middle of the length,

FIG. 18.

FIG. 19.

when fairly grown from end to end, but if otherwise, it will be regulated by the stops or joggles. Such timber as has length beyond the prescribed proportion of pane, being compass timber, and the additional length aiding the conversion, or such as shall be bonâ fide convertible for a beam piece, to be received at the discretion of the officers, who are to determine the length; two-thirds of the additional length to be measured for the cubic contents.