58 The Diseases of Animals 
The temporary incisors in eattle are erupted, or cut. 
as follows: The central incisors or nippers are up at 
birth, the internal lateral at one week old, the external 
lateral at two weeks, and the corner incisors at three 
weeks old. They are replaced by permanent incisors 
approximately as follows, though they vary much more 
than in the colt: The central incisors are replaced 
at twelve to eighteen months; the internal laterals at 
about two and a half years; the external laterals at 
three to three and a half years; and the corner incisors 
at about three and a half years. 
In horned eattie, a ring of the horn makes its ap- 
pearance at three years of age, and a new ring is added 
annually thereafter. 
COLOR OF HORSES 
In selecting horses, the color is largely a inatter of per- 
supal preference; but, other things being equal, horses 
of decided dark color are preferable. A blood bay, 
mahogany brown, dark chestnut and black are usually 
given preference in the order named. The objection to 
white or light-colored horses is the diffiewlty in keeping 
them clean, the looks of light hair upon dark clothing 
when the animals are shedding their coats, and the 
fact that such animals are subject to melanotie tumors 
of the skin. Horses having white noses and muzzles are 
liable to inflammation of the skin in this region when 
turned out to pasture. A color that will nct bleach 
when exposed to the sun or weather is desirable. 
A matched team is made up of horses of the same 
