. History of Hereford cattle : proven conclusively the oldest of improved breeds . Hereford cattle. 'TI201- FIG. 1. CALF'S TEETH AT BIRTH. "It will prol)ab]y be conceded, that persons who are concerned with the breeding and feed- ing of animals are not always free from risk of error, and it certainly can be proved by the logic of facts that all are not scrupulously exact in such matters as the statement of an animal's age. It therefore becomes necessary to supple- ment or correct the exhibitor's certificate, by such evidence as the ft ^7" ., A ra animal itself affords; \ V - - ^1 lil
. History of Hereford cattle : proven conclusively the oldest of improved breeds . Hereford cattle. 'TI201- FIG. 1. CALF'S TEETH AT BIRTH. "It will prol)ab]y be conceded, that persons who are concerned with the breeding and feed- ing of animals are not always free from risk of error, and it certainly can be proved by the logic of facts that all are not scrupulously exact in such matters as the statement of an animal's age. It therefore becomes necessary to supple- ment or correct the exhibitor's certificate, by such evidence as the ft ^7" ., A ra animal itself affords; \ V - - ^1 lillr ^'^'^ ^-'y common eon- sent, the periodical changes to which the teeth are sub- ject, are accepted as indications of age, only second in value to positive pjroof of the date of the ani- mal's birth. "How far the cul- tivation of breeds, by artificial selec- tion and high feed- ing, has influenced the development of the teeth, in com- mon with other organs connected with nutritive functions, can only be inferred from the great difference which exists between, the accounts of the older veterinary writers on dentition of ani- mals and the facts which are familiar to the few experts of this generation who have taken the trouble to investigate the subject for them- selves. "In this country the most popular writer on veterinary science was Mr. Youatt, whose works on the horse, ox, sheep and pig were published by the Society for the Diffusion of Useful Knowledge. Youatt's remarks on the teeth are copied almost verljatim from M. Girard's work on dentition ; and it may be without hesitation asserted, that if Girard's description of the teeth of the ox, sheep and pig were correct at the time when they were written, an improved system of breeding and feeding must have oc- casioned a very remarkable change in the rate of development of the teeth. In the year 1850 I commenced some investigations on the ani- mals which were bred on the Royal Agricul- tural College Farm, for the
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Keywords: ., bookcentury1900, bookcollectionbiod, bookdecade1900, bookyear1902
