At a year old, rams, ewes, and wedders, lose the two fore teeth of the under jaw; they have no incisive ones in the upper; six months after the two neighbouring teeth fall out also; at three years of age they are all replaced, are then tolerably even and pretty white, but as the animal increases in years they become uneven and black. The age of the ram is also known by his horns; they appear the first year, and sometimes at his birth, and a ring is added to them every year after as long as he lives. In general the ewes have no horns, but in their places two bony prominences; nor withstanding there are some which have two and even four horns. These ewes are like the others; their horns are five or six inches long, but less twisted than those of the ram, and when they have four, the two anterior are shorter than the other two. The ram is capable of generating at eighteen months, and the ewe to produce at a year old; but it is better not to couple them before the ram is three and the ewe two; as before that period the young will be feeble and weak, which indeed is generally the case with their first productions. One ram is sufficient to attend 25 or 30 ewes; he should be chosen from the strongest and handsomest of his species; he should have horns, for there are some rams in our climate which are without, but they are less vigorous, and less proper for propagation[I]. A good and handsome ram should have a large thick head, a wide forehead, large black eyes, broad nose, big ears, thick neck, long high body, large loins and crupper, and a long tail. The best rams are the white ones, well covered with wool on the belly, the tail, the head, the ears, and quite up to the eyes. Ewes which have wool in the greatest abundance, most bushy, whitest, and most silky, are the best for propagation; especially if they are large, have thick necks, and walk nimbly. It has also been remarked, that those which are rather lean than fat are the most successful breeders. [I] This does not always hold good, since the Lincoln sheep are without horns, and are at the same time as fine and as large as any in England.