470 NAVIN ON THE HORSE. 



make them heal. Take a stick of caustic, and touch the sore 

 over with it until a white film appears over it. If there is 

 fungus, or proud-flesh, press the caustic well down in it until it 

 is destroyed. It is well to j^oultice after using the caustic. It 

 is a good remedy for lampas. Pass the stick along all the in- 

 flamed bars, until they look white. This is a much milder 

 measure than burning. 



Nitric Acid. — rPure nitric acid is a clear liquid, commonly 

 called aqiia fortis. It is a powerful caustic, burning or eating 

 away the flesh to which it is aj^plied. It enters into the com- 

 position of some very good external applications for skin dis- 

 eases. It has a cleansing effect when thus used. 



Nux Vomica. — The nux vomica bean, or dog-button, is a 

 powerful stimulant to the nerves of motion. It is so powerful 

 that experiments in its use have not been extensive. I have 

 been informed, by authority that I regard reliable, that it is a 

 certain and very quick remedy for colic. The bean is rasped 

 or scraped down, and the quantity that would lie on a ten-cent 

 coin given, mixed in water. This dose would be perfectly safe. 



Oil of cedar is a popular article in many liniments. It 

 is a good external stimulant. Internally, it is stimulant, anti- 

 spasmodic, and diuretic. The dose would be one or two table- 

 spoonfuls. 



Olive Oil, or Sweet Oil. — This oil is sometimes given as a 

 purgative when better ones are not to be had. A pint is given 

 for this purpose. 



Opium is a well-known drug, chiefly brought from Turkey 

 and India. It is more extensively used in medicine than any 

 other article. It is the Samson in the treatment of the horse. 

 It is used mostly in tlie form of tincture, commonly called 

 laudanum. It is narcotic, antispasmodic, sedative, and strin- 

 gent. It is only narcotic in very large doses. It is j^rinci- 

 pally used where an antispasmodic and sedative are necessary 

 to relieve pain and cramping, or griping. It is not proper to 

 administer it when a high degree of fever is present, but when 



