. The book of the farm : detailing the labors of the farmer, steward, plowman, hedger, cattle-man, shepherd, field-worker, and dairymaid. Agriculture. THE TEETH OF DOMESTIC ANIMALS. 455 on each side of the head. The second dentition is only completed as soon as as all the milk-teeth have fallen; and these are not only replaced, but 3 other molars on each jaw rise up, one after the other, until the whole dental arch Fig. THE VERTICAL SECTION OF THE HEAD OF THE WILD BOAR, SHOWING THE TEETH AND THE NERVOUS SYSTEM IN CONNECTION WITH THEM. is completed, when the entire complement is 44 teeth,
. The book of the farm : detailing the labors of the farmer, steward, plowman, hedger, cattle-man, shepherd, field-worker, and dairymaid. Agriculture. THE TEETH OF DOMESTIC ANIMALS. 455 on each side of the head. The second dentition is only completed as soon as as all the milk-teeth have fallen; and these are not only replaced, but 3 other molars on each jaw rise up, one after the other, until the whole dental arch Fig. THE VERTICAL SECTION OF THE HEAD OF THE WILD BOAR, SHOWING THE TEETH AND THE NERVOUS SYSTEM IN CONNECTION WITH THEM. is completed, when the entire complement is 44 teeth, of which 22 are on the uppei-, and 22 on the lower jaws, and they are divided thus : 12 in- cisors, 4 tusks, and 28 molars. These teeth are composed of 2 substances, the one bony, the other enameled. " The tusks are each inclosed in a socket, filled with a substance analogous to the marrow of the long bones ; it is most remarkable and most abundant in the inferior tusks. These teeth are only provided with enamel upon the external face of the per- manent ;* In regard to the indications of age by means of the teeth, in the horse the marks on the crowns of the front teeth on the lower jaw are almost always obliterated, or at least cannot be depended on after 9 years of age. After that period, the only means of judging is by the quantity of ma,tter ground off the top of the teeth, and by the distance between the teeth ; the older the horse gets, the wider the space between them becomes. In re- gard to the grinding down of the teeth, however, you should know that pasturage on sharp land, and support on hard meat, such as unbruised corn and beans, will wear down teeth much faster than pasturage on soft land and prepared food. The same remark applies to cows which have been pastured on sharp or soft land, and been fed on straw and turnips, or on boiled food, and it is only applicable to them; for as to steers, their age cannot be mistaken, from the growth and conditio
Size: 2134px × 1171px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1850, booksubjectagriculture, bookyear
