Handbook of meat inspection . heef animalüue and one-half years old. The teeth of old auimals, however, may corae to resemble the milkincisors in poiut of size, and, in fact, tliis similarity lias already givenoccasion in slaughterhouses to errors in judging the age of animalslinder one and one-half and over teu yeais. By making a carefulexamination, however, even of tlie teeth alone, and when the hornsand the condition of tlie syraphyses do not enter into consideration,such mistakes are impossible. For the teeth of such old cattleproject so far out of the alveoli that a large part of the root
Handbook of meat inspection . heef animalüue and one-half years old. The teeth of old auimals, however, may corae to resemble the milkincisors in poiut of size, and, in fact, tliis similarity lias already givenoccasion in slaughterhouses to errors in judging the age of animalslinder one and one-half and over teu yeais. By making a carefulexamination, however, even of tlie teeth alone, and when the hornsand the condition of tlie syraphyses do not enter into consideration,such mistakes are impossible. For the teeth of such old cattleproject so far out of the alveoli that a large part of the root isvisible. Furthermore, even if some doubt is still entertained, it iseasy, by exposing the alveoli in the jaw of a slaughtered animal, toconvince ones seif whether the permanent teeth, which have notyet broken through, are present together with the visible incisors. The German Agricultural Society has established the followingrules for the determination of the age of German cattle : RECOGNITION OF AGF AND SEX 223 Fio, As a rnle, tho first cliange of teeth occurs at the age of one andone-Lalf years. The central milk incisors fall out, the jiermanenfccentral incisors appear and attain their füll height at the age of twoyears. At the age of two andone-half years, the inner middleincisors fall out. The correspond-ing permanent incisors grow totheir füll height toward the endof the third year, and come intowear. As a rule, from the ageof three and one-quarter to tlireeand one-half years, the externa!middle incisors fall out, and thepermanent incisors come into wearduring the fouvth year. At theage of four and one-quarter tofour and one-half years, the milkCorners fall out, and the corres-ponding permanent teeth comeinto wear during the end of thefifth year. At the completion of the change of teeth, good criteriafor judging are obtained in the wear of the incisors and in the
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