224 
FIR TREE. 
runs from the wound, and when the horn is full 
they empty it into the bottle which hangs to their 
girdle, and the contents of these bottles are again 
poured into others of larger dimensions made of 
goat skin, in which the turpentine is afterwards re- 
moved to the place of sale. It is singular that the 
tumours which are found under the bark, when 
they occur of an oval figure, have their longest 
diameter always horizontal, and never perpen- 
dicular. 
The different species of this genus produce abun- 
dance of pitch, resin, and tar. For the manner in 
which each of these products is obtained we must 
again apply to M. Duhamel, who has given an ex- 
cellent description of the process, chiefly from the 
remarks of M. Gaultier. 
Neither all kinds of pines, nor all pines of the 
same species, produce an equal quantity of re- 
sinous juice. It is well known that some pines 
will yield three pints in one summer, while others 
will not afford half a gallon during the whole time 
they last. Tins difference does not seem to de- 
pend on the size, or on the age of the tree, or en- 
tirely on the nature of the soil, since it may be ob- 
served in the same forest; but in general it has 
been remarked, that trees with the thickest bark, 
and which have been most exposed to the heat of 
the sun, yield the greatest quantity. 
The persons who are employed to collect the 
resin, usually choose such trees as are about four or 
five feet in circumference. At the foot of the tree 
