160 ORIGIN OF CULTIVATED PLANTS. 



The processes of cultivation and preparation of the 

 sugar are described in a number of works, among which 

 the following may be recommended : de Tussac, Flore 

 des Antilles, 3 vols., Paris; vol. i. pp. 151-182; and 

 Macfadyen, in Hooker's Botanical Miscellany, 1830, 

 vol i pp. 103-116. 



