144 THE CHEMISTRY OF THE PLANT 
Pinene 
C 10His 
d-Limonene 
C 10H 16 
Cineol (Eucalyptol) 
Ci0His0 
Linalool 
CioHisO 
Citral 
C 1 oH 1 Ae) 
Tanacetone 
C, oH16O0 
Camphor 
Ci0Hi60 
Menthol 
C 10H 200 
Caoutchoue 
(CioHis)n 
Gutta Pevcha 
(CyoHi60) n 
Carbohydrates. 
Chief constituent of turpen- 
* tine. 
The chief oil of the orange 
rind, also of oil of dill, oil of 
erigeron. Together with pi- 
nene it forms oil of citron. 
In oil of Eucalyptus. 
In oils of lavender and gera- 
nium. 
In oil of bergamot. 
In oil of tansy. 
In all parts of the camphor 
tree. 
Chief constituent of oil of 
peppermint. 
Produced in the latex of many 
plants, especially Apocynaceae 
and Euphorbiaceae. 
In the latex of Isonandra 
gutta and many other Sapo- 
taceae, 
The compounds’ grouped 
under this head are in their 
nature in some cases alde- 
hydes, in others ketones. They 
may be combined into more 
complex anhydrides or ethe- 
real derivatives. They con- 
sist of carbon, hydrogen and 
oxygen in the proportion 
C,H2yOy in which x and y 
may be equal, or y may be one > 
or more less than x (eg. 
C6Hi20., Cy2H2O11, etc.). 
Mostly x=6 or a multiple of 
6. The forms with low value 
for x (5 or 6 or 12) are soluble 
in water and sweet to the 
eh ® od: 
