Part 1

U. S. DEPARTMENT OF AGRICULTURE.

BUREAU OF PLANT INDUSTRY--BULLETIN NO. 235.

B. T. GALLOWAY, Chief of Bureau.

WILD VOLATILE-OIL PLANTS AND THEIR ECONOMIC IMPORTANCE: I.--BLACK SAGE; II.--WILD SAGE; III.--SWAMP BAY.

FRANK RABAK,

Chemical Biologist, Drug-Plant, Poisonous-Plant, Physiological, and Fermentation Investigations.

+Issued January 30, 1912.+

WASHINGTON:

GOVERNMENT PRINTING OFFICE.

1912.

BUREAU OF PLANT INDUSTRY.

Chief of Bureau, +Beverly T. Galloway+.

Assistant Chief of Bureau, +William A. Taylor+.

Editor, +J. E. Rockwell+.

Chief Clerk, +James E. Jones+.

+Drug-Plant, Poisonous-Plant, Physiological, and Fermentation Investigations.+

SCIENTIFIC STAFF.

Rodney H. True, Physiologist in Charge.

A. B. Clawson, Heinrich Hasselbring, C. Dwight Marsh, and W. W. Stockberger, Physiologists.

James Thompson and Walter Van Fleet, Experts.

Carl L. Alsberg, H. H. Bartlett, Otis F. Black, H. H. Bunzel, Frank Rabak, and A. F. Sievers, Chemical Biologists.

W. W. Eggleston, Assistant Botanist.

S. C. Hood, G. F. Mitchell, and T. B. Young, Scientific Assistants.

Alice Henkel and Hadleigh Marsh, Assistants.

G. A. Russell, Special Agent.

LETTER OF TRANSMITTAL.

+U. S. Department of Agriculture+, +Bureau of Plant Industry+, +Office of the Chief+, Washington, D. C., October 14, 1911.

+Sir+: I have the honor to transmit herewith and to recommend for publication as Bulletin No. 235 of the series of this Bureau a manuscript prepared by Mr. Frank Rabak, Chemical Biologist, entitled “Wild Volatile-Oil Plants and Their Economic Importance: I.--Black Sage; II.--Wild Sage; III.--Swamp Bay,” submitted by Dr. R. H. True, Physiologist in Charge of the Office of Drug-Plant, Poisonous-Plant, Physiological, and Fermentation Investigations.