. Beginnings in animal husbandry. Livestock; Poultry. Us BEGINNINGS IN ANIMAL HUSBANDRY. Fig. 75. 3,'2 years old. Some time between the sixth and ninth month, two more ap- pear, one by the side of each outer tooth. These six pairs are called nippers. They are the milk teeth, and are only tem- porary. They are not all equally level with one another at first, but in the course of 12 months or so they become uniform on the surface. The outside of the tooth is a very hard, white enamel. This covers a hard, ivory-hke bone, while at the center is a soft, bony substance which more easily wears away,
. Beginnings in animal husbandry. Livestock; Poultry. Us BEGINNINGS IN ANIMAL HUSBANDRY. Fig. 75. 3,'2 years old. Some time between the sixth and ninth month, two more ap- pear, one by the side of each outer tooth. These six pairs are called nippers. They are the milk teeth, and are only tem- porary. They are not all equally level with one another at first, but in the course of 12 months or so they become uniform on the surface. The outside of the tooth is a very hard, white enamel. This covers a hard, ivory-hke bone, while at the center is a soft, bony substance which more easily wears away, but is con- stantly renewed. The ends of the teeth have a ridged cutting surface, forming at the centers small depressions, or "cups," marks by which the age is deter- mined. The cups in the central pair of nippers at first are dark of center; in the second year they begin to wear light in color, and these cups become smaller than those of the other four. Similar changes follow in order in the other pairs. At three years of age, per- manent incisors or nippers be- gin to appear. These teeth are larger than the first ones, which were small but suited to the mouth of the colt. The first or I'ig. 77. J years 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 Plumb, Charles Sumner, 1860-1939. St. Paul, Minn. : Webb Pub. Co.
Size: 2034px × 1229px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectpoultry, bookyear1912
