CHAPTER Vm. 

 BODY OP THE HOESE, ITS EXTERNAL ACCIDENTS AND DISEASES. 



I. CARIES. II. NECROSIS. III. OSTEO POROSIS. V. EXOSTOSIS OP THE JAW. 



VI. BROKEN BACK. VII. SPRAIN OF THE BACK. VIII. BROKEN RIBS. 



IX. BROKEN TAIL. X. FRACTURE OF THE SKULL. XI. TUMORS. 



XII. GOITRE. XIII. INFLAMED PAROTID GLAND. XIV. FISTULA OF THE 



PAROTID DUCT. XV. FISTULOUS WITHERS. XVI. POLL EVIL. XVII. 



INFLAMED JUGULAR VEIN. XVIII. SADDLE GALLS. XIX. SIT FASTS. 



XX. SURFEIT. XXI. DROPSY. XXII. CHORDES. XXIII. HERNIA. 



XXIV. WARTS. XXV. RAT-TAIL. XXVI. ITCHY TAIL. XXVII. ITCHY 



SKIN. XXVIII. MELANOSIS. XXIX. HIDE BOUND. XXX. ECZEMA. 



I. Caries. 



This is molecular death or ulceration of a bone. It may affect any 

 bone in the body. The bones most frequently af- 

 fected by caries are the teeth ; the lower jaw, 

 from injury from the bit ; the jaw bones, from 

 diseased teeth ; bones of the neck, from poll evil ; 

 spines of the back, from fistulous withers ; bones 

 of the tail, from docking — in fact, any bone sus- caries. 



taining an injury of sufficient severity to cause a or the lower jaw-The eflFect 

 sloughing of the bone substance. ° ^'"^*p" 



Causes. — Wounds, either contused, lacerated, or clean cut, affecting 

 the bone, are liable to be followed by inflammation, ulceration, and 

 sloushinsr of the bone substance. 



How to Know it. — A peculiar, offensive odor is the first indication that 

 the bone is affected — an odor of decayed teeth ; the discharge that comes 

 directly from the bone is small, but there is sufficient mixed with the pus 

 from the fleshy surface to give the whole the characteri.stic odor. The 

 surface of the bone is usually rough when felt with the finger, and has a 

 tendency to spread if neglected. The surrounding parts always swell 

 considerably, and become, in long-standing cases, quite hard and cal- 

 loused. 



What to do. — Wash the part, and make an opening on the under side, 

 if possible, to allow a free escape of the pus ; scrape the diseased surface 

 of the bone Mith a dull edge, and dress twice a day, with the following 

 lotion : 



No. 28. 2 Drachms hydrochloric acid, 



J^ Pint water, 

 Mix. 



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