144 



THE CHEMISTRY OF THE PLANT 



Pinene 



GioHie 

 d-Limonene 



Cineol (Eucalyptol) 



C, H 18 O 

 Linalool 



C 10 H 18 

 Citral 



C 10 H 16 

 Tanacetone 



C 10 H, 6 O 

 Camphor 



C 10 H 16 O 

 Menthol 



C 10 H 20 

 Caoutchouc 



(CioHie)n 



Gutta Percha 



(CioH 16 O) 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 Isonand~a 

 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 x H 2y O y in which x and y 

 may be equal, or y may be one 

 or more less than x (e.g. 

 C 6 Hi 2 6 , C 12 H 22 On, 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 



