DISEASES OF THE RESPIRATORY ORGANS. 403 



he eats, to lay the dust. Give the following mixture twice a day in soft 

 feed : 



No. 42. 2 Ounces powdered lobelia seed. 



2 Ounces liuseed meal, 

 Mix. 



Divide into eight doses ; give one night and morning. When they are 

 gone, wait a week and repeat it. Avoid giving too much, as it is apt to 

 weaken the kidneys. Always drive a horse slowly 

 that has the heaves. 



X. Congestion of the Lungs. 



Congestion, is always a precursor of inflamma- 

 tion of the lungs, but it sometimes comes on in 

 such a way, as to need separate consideration. 

 The pathology of it is turgescencc of the lung 

 tissue by stagnation of the capillary blood vessels 

 and arterioles. Under favorable circumstances it bad position. 



improves, and total recovery is the result, but in For head of horse affected with 



,T ... ,, j'rt ,. heaves; for it aggravates the 



bad cases it is very apt to run on to niflanmiation difficult breathing, 

 of the lung tissue, and a case of pneumonia is the result. 



Causes. — Overexertion when not in condition to take it ; the system is 

 fat ; the blood is rich and fat ; the lung tissue is weak from want of use 

 during longer or shorter periods of idleness. When in this condition, the 

 horse is taken out, perhaps, once a week, and the driver thinks because he 

 has had so long a rest, he ought to be able to go faster than if he were 

 out every day, and sends him through to beat the crowd. Congestion of 

 the lungs is quite frequently the result. This is oftener seen in the old 

 country among the hunters, but is not infrequent in this country among 

 the gentlemen's road horses. From the contraction of the muscular 

 tissue, the blood is thrown inwardly to the lungs, liver and spleen ; the 

 lung tissue becomes fatigued, and the small blood vessels surcharged with 

 blood to such an extent as to interfere with the circulation. 



How to know it. — The horse suddenly stops, all out of breath ; nos- 

 trils distended ; the countenance has a look of anxiety upon it ; he looks 

 around as if in search for more air ; paws the ground in his endeavor to 

 breathe, and acts generally as though suffocation were near. 



What to do. — Let him stop ; turn his head towards the wind ; loosen 

 all harness that interferes with the free expansion of the chest and pass- 

 age of air to the chest ; let down the check rein ; loosen the throat lash ; 

 remove the collar or breast plate and girth ; and a small stab of the knife 

 m the roof of the mouth to draw a little blood may assist in restoring the 

 circulation. As soon as he is sufficiently recovered, take him home quietly 



