Advanced Course. xx + 770 pp. $3.50.
Briefer Course. viii + 531 pp. $1.50.
General Biology.
By William T. Sedgwick, Professor in the Mass. Institute, and Edmund B. Wilson, Professor in Columbia University. xii + 231 pp. $1.75.
Botany.
By Charles E. Bessey, Professor in the University of Nebraska.
Advanced Course. x + 611 pp. $2.20.
Briefer Course. vii + 356 pp. $1.12.
Zoology.
By A.S. Packard.
Advanced Course. viii + 722 pp. $2.50.
Briefer Course. viii + 338 pp. $1.12.
Elementary Course. viii + 290 pp. 80 cents.
The Human Body.