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UNITED STATES AND MEXICAN BOUNDARY SURVEY. DEPARTMENT OF THE INTERIOR.

INV

MIT

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INTRODUCTION. ...... By C. C. Parry, M. D).
BOTANY. . . . . . . . . By JOHN TORREY, M.D.
CACTACEÆ. . . . . . . By GEORGE ENGELMANN, M.D.

WASHINGTON:

ON THE

UNITED STATES AND MEXICAN BOUNDARY SURVEY,

MADB UNDER

THE DIRECTION OF THE SECRETARY OF THE INTERIOR,

BY

WILLIAM H. EMORY,

MAJOR FIRST CAVALRY AND UNITED STATES COMMISSIONER.

WASHINGTON:

1858.

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