Page.
Distribution of wild aromatic plants 7
Present production of volatile oils from wild plants native to the 7
United States
Classification of volatile oils based on their odors and 8
constituents
Commercial importance of volatile oils and their constituents 8
Plant sources of camphor, borneol, and cineol (eucalyptol) 10
Commercial uses of camphor, borneol, and cineol 13
Purpose of the investigation of wild aromatic plants native to the 14
United States
Special investigations 14
Black sage 14
Botanical description and distribution 14
Distillation of the oil 14
Separation of stearoptene 15
Identification of camphor 15
Chemical examination of the oil 18
Chemical constants 18
Free acids 18
Combined acids 19
Fractionation of the oil 19
Identification and separation of the constituents 20
Pinene 20
Cineol, or eucalyptol 20
Camphor 20
Summary 21
Wild sage 21
Botanical description and distribution 21
Distillation of the oil 21
Separation of stearoptene 23
Identification of crystalline compound 23
Chemical examination of the oil 24
Chemical constants 24
Free acids 25
Combined acids 25
Fractionation of the volatile oil 26
Identification and separation of the constituents 27
Cineol 27
Fenchone 27
Borneol 28
Esters of borneol 28
Summary 28
Swamp bay 29
Botanical description and distribution 29
Distillation of the oil 30
Chemical examination of the oil 31
Chemical constants 31
Free acids 31
Combined acids 32
Soluble combined acids 32
Insoluble combined acids 32
Fractionation of the oil and separation of the stearoptene 32
Identification of the constituents of the oil 34
Camphor 34
Aldehyde constituent 34
Cineol, or eucalyptol 34
Borneol 35
Summary 35
Conclusions 36