Volume X current. Price, $2.50 per volume in advance. Volume I

is out of print.

BOTANY.—W. A. Setchell, Editor. Volumes I-IV completed. Volumes V to VII in progress.

CLASSICAL PHILOLOGY.—William A. Merrill, Herbert C. Nutting, James T. Allen, Editors. Price per volume, $2.50. Volumes I to IV, VI and VII, completed. Volume V in progress.

ECONOMICS.—Volumes I ($5.00), II ($4.00), and III ($3.50) completed. Volume IV in progress.

EDUCATION.—Volumes I ($3.50), III ($3.50), and IV ($2.50) completed. Volumes II and V in progress.

ENGINEERING.—Charles Derleth, Jr., Editor. Volumes I and II in progress.

GEOGRAPHY.—R. S. Holway, Editor. Price per volume, $5.00. Volume I completed. Volume II in progress.

GEOLOGY.—Andrew C. Lawson and John C. Merriam, Editors. Price per volume, $3.50. Volumes I-VII completed. Volume VIII in progress.

HISTORY.—Henry Morse Stephens, Editor. Volume I completed. Volumes II and III in progress.

MODERN PHILOLOGY.—Charles M. Gayley, Hugo K. Schilling, and Rudolph Schevill, Editors. Volumes I to VII completed. Volumes VIII and IX in progress.

PATHOLOGY.—Frederick P. Gay, Editor. Price per volume, $2.50. Volumes I and II completed.

PHILOSOPHY.—George H. Howison, Editor. Price per volume, $2.00.