‎"JENNINGS, H. S. [HERBERT SPENCER].‎
‎Heredity, Variation and Evolution in Protozoa. I. The Fate of New Structural Characters in Paramecium, in Connection with the Problem of the Inheritance of Acquired Characters in Unicellular Organisms.‎

‎Baltimore, Williams & Wilkins Company, 1908. Royal8vo. Offprint, uncut, unopened in the original printed wrappers. Reprinted from ""The Journal of Experimental Zoölogy"", Vol. V [5], No. 4. Light miscolouring to front wrapper, otherwise a very fine and clean copy. 577-632 pp.‎

Reference : 48006

‎Scarce offprint of Jennings' important work in which he published the results of his investigations of heredity and selection in Paramecium. ""Most of this lons paper was devoted to a study of the effects of environment and growth upon the sizes of Paramecium, both effects were found to be quite large. (Provine, The Origins of Theoretical Population Genetics, P. 100)""Herbert Spencer Jennings was widely recognized and greatly respected not only as a pioneering biological investigator but also as a thinker, philosopher, and educator . He was a master of the art of setting forth simply, clearly, and vividly, in print and in public lectures, the current state of genetics and general biology and of recognizing and pointing out their implications for the general public and for specialists in various disciplines. ""Herbert Spencer Jennings (1868-1947), American botanist who was trained at Illinois Normal School and the University of Michigan, then spent a year studying protozoans with Max Verworn at the zoological station in Naples. In the early twentieth century, Jennings began studying inheritance and evolution in protozoans and introduced new experimental methods for laboratory study. By 1920 he had left the laboratory to popularize genetics and harmonize the relationship between biology, religion, and the humanities.‎