ON ESSENTIAL ous. i “AS 
sirable ea out etch, parts of. tie: Tyiskor tree contained the — 
: roportion of camphor, so as to benefit from this knowledge in order to secure 
the: most | valuable “material, distillations were. made of the various parts of trees 
8 to 12 years old. It. resulted that the spring leaves contained more crude camphor 
z ‘than: the summer leaves, but these were comparatively richer in pure camphor, most 
: likely” owing | to the evaporation of. the volatile — constituents of the camphor oil 
. - (torpenes) cee } 
Furthermore, two 13-year- ae trees were cut. to the ‘ground and the material sorted 
- into leaves, twigs and wood of various ages, when | it resulted that the young wood 
_ contains. too little camphor | to be taken into” consideration for the production. 
j Experiments with trees of even age, some of which had grown in the shade, 
__ showed that shading has but little influence on, the camphor content of the paves 
3 so that it does not matter in which direction the hedges are planted. 7 
3 lt has been repeatedly recommended to prune the trees strongly every year, but . 
>» 
~ Hood succeeded in- showing that by this method one’ gets a lot of wood with very — 
little. camphor i in it and that even the camphor content of the leaves is thus reduced. 
2 - The watery shoots are much poorer in camphor than normally grown branches or twigs. _ 
7d _ However, if the trees and hedges are only trimmed, a aes yield of camphor may | 
be expected in the following period of vegetation. - Segcue 
‘ 2 Camphor | trees are often “planted in order to protect orange eden against the: 
wind or to replace orange trees that have died. Such trees are then manured sometimes, 
develop very well and contain much camphor. As a rule, quickly growing trees _ 
_ distinguish themselves by a. thick foliage and considerable camphor content. This — 
~ must be taken into consideration when cut ating Samphior uees, in erdey to foster 
their growth as much as possible. . 
~The soil likewise influences the camphor content. The mentee yield of Bac 
is supplied by trees growing on a heavy clayey soil and it decreases rapidly as the i 
soil gets sandier and drier. It is true, however, that trees on extraordinarily dry sandy - 
soil. distinguish themselves by a’ very high camphor content, but such trees are 
Benoiderably oe ake in growth. » | 
~~ : "aS aeatiae Prune ok Se ager 
3 thee ‘Camphor contents ‘of the various acs of Florida cauiphior trees: mar ie 
ae - crude camphor oun ‘pure a ie 
peering leaves. ~~ | aban tery An gd A DER CENT och 1.31 per cent. - 
summer leaves . from tes : 1.46 i a LAVAS He 
spring twigs. .[° °° on 7 i OC Done mamas es Wai amen iety 
- summer twigs .J } LDR Novitt 4 O,898 boo. 
ee yt i2and t17 po. >. 0.87 and 0.88 pc. 
Saas year's twiss 7. PROD el Ode a OAR OAR an 
ast Wears AWISS. 55 ah 0.80), OG Soule) 7 O28 sas OO 
a __ branches, 1.9 to 3.8 cm. in diameter | . O05 oe O52, 0.39.5). 038 =. 
 ~ 10.2.cm: in’ diameter ©. | bp ae Wao: nen Oaer adr FOS SOLE 
ca, NES, Cath 8 EE in & tree ~ 0.92 p.c. sy 0.60 p. c. 
_ wood from the outer 4 annual rings {13 years} Seen ees ae ) pat eae 
a of a branch 8 years old .. .| ee 1.26 and 1.87 p.c. 0.74 and 1.33 p.\c. . 
ood from the inner 4 annual rings | i 
Fe a branch 8 years old. Gee ee EOS. eek ey; O58se 50.82: %, 
- bark from the branches. - SP iarede tx as OhO\ Dn Cae 608 7 * 0.50 p. c. 
Rikly trunk . ap 4 ie ra 9 0.11 oF ENN iat 0,07 a 
jae 
a 
