xiv CONTENTS 



SECTION 2.— THE CARBOHYDRATES PRODUCED 



IN CROPS. 



PAGE 



(a) Sugar. Its production in tropical and temperate climates. The manu- 

 facture and purification of sugar. Sugar-cane, sugar beet, dates, 

 mangels, turnips . . . m 



(<5) Starch. Its production and manufactured forms. Wheat, maize, rice, 



potatoes, sago, tapioca . . , 117 



(c) Cellulose. Fibres, etc. The chief kinds. Their manufacture and uses. 



Cotton, linen, jute, hemp, timber, paper . . . . . .124 



{(/) Gums and mucilage . , . , . , . , .131 



References ............ 132 



SECTION 3.— THE OIL-BEARING PLANTS. 



{a) Linseed. Its growth and use for oil and cattle food. Poisonous com- 

 pounds sometimes developed 135 



(6) Cotton. Its growth and use for oil and cattle food. Different kinds 



of products according to climate and methods of manufacture . .137 

 {c) Soya bean. Growth and methods of pressing for oil and cattle food . 138 

 {d) Palm-nuts and coconuts. Their growth and use for oil, butter substi- 

 tutes, and cattle foods . . . . . . . . •139 



(e) Earth-nuts. Rape, safflower, sesame, niger, mowha .... 142 



(/) The essential oils . . . , 145 



References 145 



SECTION 4.— THE NITROGEN COMPOUNDS 

 IN PLANTS. 



(a) Cereal proteins .......... 147 



{d) Legumen proteins 150 



(c) Root crop proteins . . . . . . . . .ISI 



{d) Oil seed proteins . . . , . , . . . • 151 



(e) The alkaloids . . . , . . . . .152 



References 1 57 



SECTION 5.— MISCELLANEOUS PLANT 

 PRODUCTS. 



{a) Tea and cocoa .......... 158 



{b) Coffee 160 



{c) Tannin ..".......... 162 



{d) Rubber 163 



(<f) Indigo 165 



(/) Fruit 166 



References 16$ 



