Pflanzliche Infektionslehre. By Ernst Gäumann

Marine Microbiology. A Monograph on Hydrohacteriology. By Prof. Claude E. Zobell.

An Introduction to the Taxonomy and Nomenclature of Fungi. By G. R. Bisby

pH and Plants. An introduction for beginners. By James Small, D.SC.

Laboratory Manual of Elementary Botany. By Arthur W. Haupt, Ph.D.

American Species of Amelanchier. By G. N. Jones.

Luther Biirbank. A Victim of Hero Worship. By Walter L. Howard, Ph.D.

Trace Elements in Plants and Animals. By W. Stiles.

An Introduction to B0Iany. By Arthur W. Haupt.

Crop Production and Environment. By R. O. Whyte.

Principles of Agricultural Botany. By Alexander Nelson.