I 



b 



INDEX. 53 



Page. 



Oleoresin, methods of ext.racti(jn 7-8 



Oleoresins, source of certain oils 12, 36 



Orange, aromatic oil 10-11, 12, 21-22, 26, 40, 43, 45 



Oregon balsam. See Balsam, Oregon. 



Origanum marjorana, source of aromatic oil 42 



wholesale price of volatile oil 45 



Oxids, relation to aroma of plants 10 



Oxydase, relation to aroma of vanilla bean 9-10 



Oxygen, action in decomposing perfumes 28-29 



Paper, use as filtering medium 28 



Parry, E. L., on low ester content of English lavender oil 13-14 



Patchouli, whplesale price of volatile oil 45 



Peach, oil contained in seed 12, 15 



Pelargonium odoratissimum, source of aromatic oil 41-42 



Pennsylvania, perfumery-plant industries 30, 37 



Pennyroyal, aromatic oil 10, 45 



distribution 40 



germination of seed 30 



Peppermint, aromatic oil 10-11, 12, 14, 43, 45 



development of industry in the United States 8-9, 30, 35, 38, 43, 46 



experiments to determine development of constituents 31-34 



export 46 



use of spent herb as stock food 27 



Perfumery. See Oils and Perfumes. 

 Perfumery plants. See Plants, aromatic. 



Perfumes, early use 7 



methods of extracting 16-27 



use in soaps and toilet preparations 43, 45-47 



See also Oils. 



Petit grain, wholesale price of volatile oil 45 



Phenols, relation to aroma of plants 10, 39 



Pimento, wholesale price of oil 45 



Pine, soiu-ce of valuable oils .■ 11, 36 



Pinus spp., source of valuable oleoresins 36 



Plants, aromatic, capable of cultivation 35-36, 40-43 



distribution 8-9, 40-42 



dried forms used before distillation was known 7 



growth and harvesting 29-34, 42 



localization of volatile oils in tissues 10, 11 



production, factors affecting 12-14, 29, 31, 42, 43-44 



use in perfumery industry 8-9, 29, 30, 35-44 



whole, source of aromatic oils 42 



wild , 35, 3(M0 



See also names of individual species. 



Prices of aromatic oils 38, 39, 44-45 



Prune, extraction of aromatic oil from kernels 15 



Pulegone, odorous constituent of pennyroyal oil 10 



Purification, methods applied to crude oils 27 



Reunion, island, perfumery industry , 8, 41 



Rosa damascena, soiu-ce of aromatic oil 41 



Roots, source of volatile oils 12, 37 



195 



