On the influence of the blue color of the sky in developing animal and vegetable life : as illustrated in the experiments of Gen. A. J. Pleasonton, between the years 1861 and 1871 at Philadelphia : read before the Philadelphia Society for Promoting Agriculture, on Wednesday, May 3, 1871
Pleasonton, A. J. (Augustus James), 1808-1894; YA Pamphlet Collection (Library of Congress) DLC