(^10) THE CHEMISTEY OF ESSENTIAL OILS
ployed. These are placed in grooves cut into the trunk with a broad
axe in such manner, that each of the two cuts forms an angle of 60°
with the longitudinal axis of the itree, and the two together therefore
FIG. 1. —Still of a ' Turpentine Farm " in the " Landes ".
[liiiitte Jieitntiid /ds
form an angle of 120° open at the top. The two gutters, however, are
not placed at the same height, hut one about 1 in. or 2 ins. above the
other, so that the resin flowing along the upper gutter only passes the
other one when flow ing down, and then passing through the lower gutter
tuis.
(Tuis.)
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