360 PHYSIOLOGY AT THE FARM. 



beans, cocoa and chocolate are prepared. Cocoa consists of 

 the roasted seeds or their outer coverings reduced to powder ; 

 while chocolate is prepared from the same, with a mixture of 

 sugar, vanilla, cinnamon, and arnotta. The seeds contain a 

 tonic principle called theobromine, allied to theine, and a fatty 

 oil is expressed from them, called the butter of cacao. The 

 pulp of the fruit, which is sweet, with a mixture of acidity, is 

 sucked and eaten raw by the natives of the countries in which 

 the tree is indigenous. This pulp also affords by distillation 

 a kind of spirit. The Brazilians suck the sweet mucilage in 

 the fruit of Guazuma ulmifolia. 



Tiliacece, Linden order. Aristotelia maqui is a native of 

 Chili, producing edible berries of a black or purple colour, 

 which the inhabitants make into wine. 



Grewia sapida, a native of the East Indies, producing acid 

 berries, which are used for sherbet. 



Cor chorus olitorius has leaves used in Egypt as a pot-herb. 



Ternstromeacece, Tea order. Thea bohea, Thea viridis. 

 The leaves of these plants constitute our Chinese tea. The 

 Assam tea is from a different species, the Thea Assamica ; but 

 the Himalayan tea is obtained from the same species which 

 affords the Chinese tea. 



Tea contains oily matter, tannin, and a bitter principle 

 called theine, which is identical with caffeine, the peculiar 

 principle of coffee. 



Camellia oleifera affords an excellent table oil. 



Aurantiacece, Orange order, or citron-worts. The Aegle 

 marmelos, the Indian bael or bela, yields a delicious fruit. The 

 decoction and jelly of the fruit are used in looseness of the bowels. 



Citrus aurantium, the orange ; Citrus vulgaris, the bitter 

 or Seville orange ; Citrus limonum, the lemon ; Citrus limetta, 

 the lime ; Citrus decumana, the shaddock. 



Cookea puncta, the edible wampee-fruit of China. 



