200 DISEASES OF THE HOESE. 



stand upon, as the horse will stamp with his foot on the 

 floor — for the action of this ointment is considered to be as 

 painful as the hot iron, for about half an hour from the 

 time it begins to act till the parts commence to swell from 

 its splendid effects. Hence, firing irons are now not much 

 used, except in the hands of old fogies. Daily, oil or 

 grease the parts for a week, then apply as before, and 

 remember, that to get all the benefit of this ointment, it 

 must be well rubbed in the parts. 



Side Bones. — A species of ring-bone ; only the side 

 cartilages of the foot are converted into bone, and do not, 

 as in ring-bone, extend round the coronet, or portion 

 immediately above the hoof. The cause and treatment 

 are the same as in ring-bone, (which see.) 



Sinus. — A long, narrow and ulcerated track, communi- 

 cating either with the inside of an abscess or diseased bone. 

 (See Fistula and Poll-evil.) 



Sitfasts. — These are hard and insensible tumors, 

 sometimes called warbles, and are caused by undue pres-" 

 sure from the harness. 



Treatment. Rub in, about the size of a bean, of the 

 ointment of red iodide of mercury. (See Prescriptions and 

 Medicines.) 



SkeletOT* of the Horse, Bones of the. — The skele- 

 ton is composed of two hundred and forty-seven separate 

 bones, which are united by joints to form the spine, thorax, 

 pelvis, tail, and fore and hind extremities. The spine is 

 finished anteriorly by the head, which is divided into the 

 cranium and face, and contains the teeth. Suspended from 

 the head is the os hyoides, which completes the number of 

 bones. Thus : — 



