H. A. Allard

1880 – 1963

• The mosaic disease of tobacco
• Tobacco in the Dominican Republic
• "Iceland Moss", Cetraria islandica, in Virginia
• Distribution of the virus of the mosaic disease in capsules, filaments, anthers, and pistils of affected tobacco plants
• Effect of dilution upon the infectivity of the virus of the mosaic disease of tobacco
• Effect of the relative length of day and night and other factors of the environment on growth and reproduction in plants
• Flowering behavior and natural distribution of the eastern ragweeds (Ambrosia) as affected by length of day
• Further observations of the response of various species of plants to length of day
• Further studies of the mosaic disease of tobacco
• Length of day in relation to the natural and artificial distribution of plants
• Length of day in the climates of past geological eras and its possible effects upon changes in plant life
• Our insect instrumentalists and their musical technique