134 THE USES OF PLANTS. 



MALVACR*. 



Gossypiuni) spp. COTTON-SEED OIL, though now 

 one of the most important, has only been prepared 

 since 1852, mainly from Egyptian cotton. 800,000 

 tons of seed (of which one quarter comes to England), 

 yielding 120,000 tons of oil and 250,000 tons of the 

 valuable oil-cake, are, it is estimated, manufactured 

 annually. It is used for soap, lubricating oils and 

 adulterating olive oil. 



LINAGES. 



Linum usitatissimum, L., LlNSEEU, of which 

 2 A33> 1 3 2 quarters were imported in 1882, mainly as 

 seed, from Russia and India, is the chief oil employed 

 in painting (see p. 81, si.iprd). 



GERAiNIACE^E. 



Pelargonium capitatum, Ait., is cultivated round the 

 Mediterranean for its essential oil, known as OIL OF 

 GERANIUM, which is used to adulterate Attar of 

 Roses;* but that obtained from Andropogon Schcen- 

 anthus, L., is known by the same name, and used for 

 the same purpose. 



AURANTIACE.E. 



Reference has already been made to the essential 

 OILS OF LEMON (Citrus Limonum, Risso, unripe fruit), 

 BERGAMOT (C. Bergamia, var. vulgaris, Risso and Poi- 

 teau, unripe fruit), NEROLI, or ORANGE FLOWER (C. 

 vulgaris, Risso, flowers), PETIT GRAIN or ORANGE 

 LEAF (C. vulgaris, Risso, leaves and shoots), ORANGE 



* * Pharm. Journ.,' ix (1852), p. 325 ; 'Kew Museum Guide/ 

 p- 24. 



