. Domesticated animals and plants : a brief treatise upon the origin and development of domesticated races, with special reference to the methods of improvement . Breeding; Domestic animals; Plants, Cultivated. NEED OF IMPROVEMENT 47 and every botanist will tell you that we may hunt forever with- out finding two plants exactly alike, so mightily are the materials mixed out of which races and individuals are made. This is variation or variability, and upon this fact are selection and improvement based. Variability in a single character. Variability arises in two distinctly different ways : firs
. Domesticated animals and plants : a brief treatise upon the origin and development of domesticated races, with special reference to the methods of improvement . Breeding; Domestic animals; Plants, Cultivated. NEED OF IMPROVEMENT 47 and every botanist will tell you that we may hunt forever with- out finding two plants exactly alike, so mightily are the materials mixed out of which races and individuals are made. This is variation or variability, and upon this fact are selection and improvement based. Variability in a single character. Variability arises in two distinctly different ways : first, by different associations of char- acters, as when one individual is red and white and another is black and white; and, second, by different degrees of develop-. FiG. 7. Jersey cow, Figgis 76106, property of C. I. Hood & Company, Lowell, Massachusetts. Champion and Grand Champion, World's Fair, St. Louis, 1904. 547 lbs. 6 oz. butter in ^\ months. Such a cow is worth perhaps a dozen of the ordinary kind that make 125 lbs. in a year ment of the separate characters, as when one individual is simply larger or fleeter or darker-colored than another. Either gives rise to what is known as variation, and either may afford the basis for natural selection. However the racial characters may be mixed in different in- dividuals, it will be found on close inspection that the separate characters are themselves highly variable ; that is to say, varia- bility is not confined to individuals but is a property of each and. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Davenport, E. (Eugene), 1856-1941. Boston ; New York : Ginn and Company
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