The influence of the blue ray of the sunlight and of the blue colour of the sky : in developing animal and vegetable life; in arresting disease, and in restoring health in acute and chronic disorders to human and domestic animals / as illustrated by the experiments of Gen. A. J. Pleasonton, and others, between the years 1861 and 1876. Addressed to the Philadelphia society for promoting agriculture.
A self-published-style scientific tract by Gen. Augustus J. Pleasonton, issued in Philadelphia in 1876 for the Philadelphia Society for Promoting Agriculture, arguing that blue light and blue glass stimulate plant and animal growth and cure disease. The few wood engravings are plain technical views — a brick chimney with a vented cowl, a glazed grapery seen in perspective — useful for line-hatched architectural detail and Victorian greenhouse forms.
