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Pleuro-pneumonia. — Inflammation of the covering and Bub* 

 stance of the lungs and chest. 



Pleurodynia. — This is a rheumatic affection of the intercostal 

 muscles, differing from pleurisy, from there being no constitutional 

 disturbance, little fever and no inflammation. It is treated with 

 a dose or two of the tincture of aconite root given internally, and 

 mustard and a little vinegar rubbed into the muscles of the sides, 

 behind the shoulder. 



Pleufo. — Fullness of blood. (See Obesity.) 



Pneumonia. — Inflammation of the lungs (which see). 



Poisons. — These act difi'erently in destroying life. They are 

 derived from the organic and inorganic kingdoms, and their effects 

 are either local or remote. Poisons may be taken into the stomach, 

 inhaled in the form of sulphuretted hydrogen, communicated 

 through the skin, as from the bite of a poisonous animal, or ab- 

 sorbed from wounds. (See Glanders.) Poisons act in one of 

 three ways. 



(1.) Irritant Poisons are those poisons the symptoms of which 

 are inflammation, irritation, and pain. Examples — arsenic, bi- 

 chloride of mercury, lead, baryta, copper, and the Spanish fly. 



Treatment. The plan to be adopted in this class of poisons in 

 the horse is : Give him large quantities of the white of eggs, milk, 

 linseed oil ; and remove the poison as speedily as possible by giv- 

 ing large quantities of linseed oil — say two quarts. The horse 

 cannot vomit ; hence, it is diflScult to procure a prompt evacuation 

 of the stomach. If the pain be great, give aconite to subdue it, 

 and to keep down inflammation and sympathetic fever. 



(2.) Narcotic Poisons. — Poisons which act on the brain and 

 nervous centres, producing stupidity or coma. 



Treatment. Give four grains of strychnia nux vomica in a few 

 pints of gruel made with vinegar. Keep the horse walking 

 around, and place chopped ice in a bag, and put it on the forehead. 



(3.) Narcotic Acrid Poisons. — Poisons acting as the above, and 

 causing irritation, inflammation, fever, and pain. Examples of 

 this class are, nux vomica and veratria. 



Treatment, Aconite wiU not only relieve the pain, but is an ex- 

 cellent antidote for strychnia ; and for aconite, strychnia may b« 

 given with advantage in cases of this variety of poisoning. 



