. Manuale di animali da fattoria; una guida pratica per la scelta, l'allevamento e mantenere dei cavalli, bovini, ovini e suini. Industria animale; cavalli; bestiame, ovini e suini. 362 Manuale di animali da fattoria Esame dei denti. - Mentre il fine di apparire- mente dei denti permanenti e il loro successivo metodo di usura sono considerate il più preciso per la stima di età tra gli ovini, essi non sono assolutamente precise né sono così affidabile come nel cavallo. Denti in ovini variano molto a seconda delle condizioni, come nel caso del cavallo (vedere pagina 8). Pecore, come bestiame, vengono forniti con tw

• Collaboratore: Central Historic Books / Alamy Foto Stock
• ID dell’immagine: PG0211
• Dimensioni dei file: 7,1 MB (352,2 KB Download compresso)
• Liberatorie: Modello - no | Proprietà - no
• Dimensioni: 1676 x 1491 px | 28,4 x 25,2 cm | 11,2 x 9,9 inches | 150dpi

Altre informazioni

Questa foto è un'immagine di pubblico dominio, il che significa che il copyright è scaduto o che il titolare del copyright ha rinunciato a tale diritto. Alamy addebita un costo per l'accesso alla copia ad alta risoluzione dell'immagine.

Questa immagine potrebbe avere delle imperfezioni perché è storica o di reportage.

. Manual of farm animals; a practical guide to the choosing, breeding, and keep of horses, cattle, sheep, and swine. Animal industry; Horses; Cattle; Sheep; Swine. 362 MANUAL OF FARM ANIMALS Examination of the teeth. — While the order of the appear- ance of the permanent teeth and their subsequent method of wearing are considered the most accurate means of estimating age among sheep, they are not absolutely accurate nor are they as dependable as in the horse. Teeth in sheep vary much according to the conditions, as in the case of the horse (see page 8). Sheep, like cattle, are provided with two sets of teeth; first, the temporary or milk teeth, and, later, the permanent teeth. The permanent teeth differ from the temporary in their greater size. The replacement of the temporary teeth by the perma- nent is made necessary by the increase in size of the jawbone as the animal becomes older. As in the case of cattle, sheep have incisor teeth in the lower jaw only, the upper being pro- vided with a cartilaginous pad. The number likewise is the same, eight in either case. The lamb is often born with one pair of milk teeth and the others soon make their appear- ance. These milk teeth are narrow and peg-like in appear- ance. When the animal is approximately fifteen months of age, the middle pair of milk teeth is replaced by permanent ones, which are fully twice as broad as the milk teeth, hence easily recognized (Fig. 105). The interval between the appearance of the succeeding pairs varies according to conditions, but can be stated as approximately eleven months. In general the age of the animal at the time each pair is up and in full wear may be estimated as follows: —. Fig. 105.- - Sheeps' Teeth, illus- trating Age. 12 months. — 15 months. 26 months. — 37 months. 48 months. — 8 years.. 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

Parole chiave associate all'immagine

• bookcentury1900
• bookdecade1910
• booksubjecthorses
• booksubjectsh