SIMPLE AILMENTS 315 



Make a lotion of — 



Calvert's Carbolic Acid (No. 5) i dr. 



Nitric Acid ... 40 drops 



Water 60 drops (1 teaspoon) 



A small quantity of tow should be saturated and introduced 

 carefully into the frog. It is very important before applying 

 the preparation that the foot is soaked for a few minutes in 

 warm water, and the parts thoroughly cleansed ; and great 

 care must be taken that on no account is the dressing 

 allowed to come into contact with the skin. One or two 

 applications are usually sufficient, and after that, tow and 

 Stockholm tar — without any addition of Sulphate of Copper 

 — may replace it, and will complete the cure. 



In compounding the lotion, first mix together the water 

 and nitric acid and then add the carbolic acid ; and this 

 should be done slowly, for a certain amount of effervescence 

 will arise. 



Sometimes the frog is so extensively diseased that it is 

 better to cut away the whole, until the sensible frog is reached, 

 and then the dressing of tar may be applied, and a bar shoe 

 put on for at least one remove, or until the new frog is 

 sufficiently grown to sustain the weight of the horse. 



Sand-crack. 



A separation of the fibres of the hoof from above down- 

 wards is thus termed, and usually commences at the 

 coronet, though occasionally it begins at the shoe surface, 

 and runs upward. An old thin knife should be heated red- 

 hot, and two cross-cuts be made with it at the very top of 

 the sand-crack, and one below it, to prevent any further 

 splitting of the fibres. In addition a round hole should 

 be made at the apex of the crack, such as can be made 

 with an old door-key when heated red-hot, and is very 

 effective against any more splitting. Two holes should be 

 drilled through on each side of the crack, and apiece of soda- 

 water wire — which will not rust — passed through them, and 



