INDEX. 55 



Page. 



Valerian, oil obtained from root 12 



Vanilla, development of odor while curing bean 9-10 



Vanillui, relation to aroma of vanilla bean 9-10 



Vetiver, cultivation in India 8 



Violet, use in perfumery industry 8, 18, 21 



Virginia, perfumery-plant industries 36, 37 



Volatile-oil industry. See Oils, volatile, production. 



Wintergreen, aromatic oil 11, 14-15, 30, 37-38, 43, 45 



Wisconsin, perfumery-plant industries 9, 30, 35 



Woods, source of volatile oils ' 12, 37 



Wormseed, American, aromatic oil 12, 30, 35-36, 45 



Wormwood, aromatic oil 10-11, 12, 45 



experiments to determine proportions of constituents 31-34 



production in the United States 9, 30, 35 



Yield, percentage of volatile oil 35, 37, 38, 39, 40, 42 



Ylang-ylang, aromatic oil 10-11, 45 



195 



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