Methods of Extracting Volatile Oils From Plant Material and the Production of Such Oils in the United States .^^

Page Introduction 1 Methods of extraction 2 Extraction by expression 2 Extraction by solution 2 Extraction with cold solid fats _-_ 3 Extraction with hot liquid fats --3 Extraction with volatile solvents 4 Extraction by steam distillation 6 Design and construction of volatile-oil stills 6 Operation of volatile-oil stills__ 12 Commercial production of volatile oils in the United States^ 15 Oils obtained from wild plants16 Cedarleaf 16 Erigeron 17 Sassafras 17 Sweet birch and winter\ green 18 Page Commercial production of volatile oils in the United States— Continued Oils obtained from wild plants—Contin ued Witch-hazel 19 Oils obtained from cultivated plants : 20 Dill 20 Japanese mint 21 Lemon grass 21 Tansy 22 Wormseed 22 Wormwood 23 Oils obtained as byproducts._ 24 Cedarwood 24 Lemon and orange 25 Apricot and bitter almond. _ 25 Hop 26 Factors to be considered in growing volatile-oil plants 26