HORSES: THEIR POINTS AND MANAGEMENT 

 Treatment (i Preventive. — Keep the feet clean. 



(2) Medicinal. — Clean the feet, but do not do this until 

 you have got a clean stable. If the stall floor does not drain 

 the urine, etc., away properly, try and make it do so. Insert a 

 little of the following powder into the cleft twice daily, and 

 then squeeze in a pledget of tow over all. As a rule this will 

 soon cure it. 



Recipe. — Calomel, h ounce ; powdered iodoform^ I ounce ; 

 mix well. Apply as directed. 



NAVICULAR DISEASE. 



Introduction. — Just behind, and articulating with, the 

 coffin and coronet bones, there is a small ship-shaped bone 

 (navicular bone) over the posterior surface of which the tendon 

 of a muscle {flexor perforans) plays, this tendon becoming 

 attached to the lower surface of the coffin bone, but before it 

 does this it expands, forming a sheath (navicular sheath) from 

 which two pouches project — one upwards, the other downwards, 

 containing a lubricating i^uid, serving to facilitate the gliding of 

 the tendon over the bone, \^'hen a horse becomes affected 

 with navicular disease — vulgarly termed " groginess," and such 

 a horse a "grog" — the different parts participating in 

 the disease are : {a) The navicular bone ; {h) The 

 tendon {perforans) ; (c) The lubricating sheath (bursa). 

 In which of these parts the disease " begins " is a much 

 disputed point. Some authorities think that it begins in the 

 bone as a rheumatic inflammation, others in the cartilage (gristle) 

 covering this, while others think it originates in the tendon or 

 else the lubricating sheath. Again, seme assert that its origin 



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