f-d-heald documents

On the Toxic Effect of Dilute Solutions of Acids and Salts Upon Plants
Documents On the Toxic Effect of Dilute Solutions of Acids and Salts Upon Plants
The Influence of Traction Upon the Growth of Plants
Documents The Influence of Traction Upon the Growth of Plants
Twenty-Eighth Annual Meeting || The Phylogeny of Bacteria
Documents Twenty-Eighth Annual Meeting || The Phylogeny of Bacteria
The Address of the President for 1912: The Dissemination of Fungi Causing Disease
Documents The Address of the President for 1912: The Dissemination of Fungi Causing Disease
Some Suggestions for Teaching Mycology
Documents Some Suggestions for Teaching Mycology