. Dentition as indicative of the age of the animals of the farm. Domestic animals -- Age; Teeth. of the Animals of tlce Farm. 51 wear ; the central incisors especially will be worn hollow on their upper surfaces, the middles and laterals also showing well- marked tables in the place of sharp cutting edges; while the recently cut corner incisors, supposing their eruption to have been delayed till the sheep was nearly four years old, will pre- sent a marked contrast to the rest of the teeth which have suffered from attrition. These appearances are shown in the next drawing (Fig. 50) of the mouth
. Dentition as indicative of the age of the animals of the farm. Domestic animals -- Age; Teeth. of the Animals of tlce Farm. 51 wear ; the central incisors especially will be worn hollow on their upper surfaces, the middles and laterals also showing well- marked tables in the place of sharp cutting edges; while the recently cut corner incisors, supposing their eruption to have been delayed till the sheep was nearly four years old, will pre- sent a marked contrast to the rest of the teeth which have suffered from attrition. These appearances are shown in the next drawing (Fig. 50) of the mouth of a sheep at the age of four years. Fig. 50.—Incisors of Sheep at four years. After the age of four years, and indeed from the time of the completion of permanent dentition, whether early or late, the changes which are effected in the form of the incisors by wear vary according to the nature of the food, and the examiner must be content to limit his inquiries to the period within which is comprised the eruption of the permanent teeth. Dentitiox of the Pig. When dentition is perfect, the pig has six incisor teeth in the front of both upper and lower jaw—two central, two lateral, and two corner teeth. Behind the corner teeth are the tusks, one on each side, in the upper and lower jaws. Between the tusks and the molar teeth there are usually four small teeth which are described as pre-molars, one on each side of both jaws, and twenty-four molars, six on each side of the upper and lower jaws. Temporary and permanent incisors agree generally in number, form, and position, but the temporary molars are onl^ three in number on each side of the upper and lower jaws, and the third molar has three cusps instead of two. The temporary. 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 Brown, George Thomas, Sir, 1827-
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherlondo, bookyear1895
