Henry Northen

• Introductory plant science
• Greenhouse gardening
• Ingenious kingdom
• The complete book of greenhouse gardening
• The secret of the green thumb
• Alterations in the structural viscosity of protoplasm by colchicine and their relationship to C-mitosis and C-tumor formation
• Effects of methylene blue and neutral red on the structural viscosity of protoplasm
• Introductory plant science
• Studies of protoplasmic structure in Spirogyra
• The effect of centrifugal force and temperature on plant cells