The Dental record . e months and two days ; he adds the weeks which have elapsedsince the date up to which the age is calculated, and deals with theanimals as having arrived at the age of six months and nine days. Atthis period he expects to find the pre-molars and the fourth molar wellup, the fourth molar being close to the angle of the jaw, and scarcelyfree from the covering of gum at the extreme posterior part. But ifthe fourth molar stands out from the angle of the jaw, leaving spacebehind it, and if he observes in addition that the temporary cornershave been changed for permanents, he doe
The Dental record . e months and two days ; he adds the weeks which have elapsedsince the date up to which the age is calculated, and deals with theanimals as having arrived at the age of six months and nine days. Atthis period he expects to find the pre-molars and the fourth molar wellup, the fourth molar being close to the angle of the jaw, and scarcelyfree from the covering of gum at the extreme posterior part. But ifthe fourth molar stands out from the angle of the jaw, leaving spacebehind it, and if he observes in addition that the temporary cornershave been changed for permanents, he does not hesitate to assert thatthe pig is at least a month older than it is certified to be. In somepigs the corner permanents are found with their points through thegum at seven months, but in the majority of cases the temporaryorgans remain till the animal has reached the age of eight months. At nine months, the corner permanent teeth are well up, and thepresence of the permanent tusks may be through the gum in very. Fig. 46.—Molars of Pig at nine months. forward animals at this age. In looking over the notes of the inspec-tions which have been made for many years past, it is quite certainthat, as a rule, the pig at the age of nine months has the temporary VOL. IV. z 354 THE DENTAL RECORD. tusks, or at least some of them, still in position ; in fact, the presenceof well-developed tusks in a pig entered as not exceeding nine monthswould be a fair ground of disqualification, unless the animal were aboar, in which case early development of the tusks is expected. Thedrawings (Figs. 46 and 47) show the state of the teeth at nine months. A class for pigs not exceeding nine months of age at many Showstakes the place of the six months class, and therefore includes pigs ofvarious ages from two or three months to over eight months. Dis-qualifications in this class generally affect pigs which are really undernine months, in which the state of the dentition indicates the age tobe above t
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