DR. LEGEAR'S STOCK BOOK. 91 



Sweet nitre '2 ounces. 



Laudanum or chloral hydrate 1 ounce. 



Water 1 pint. 



Mix, and give as a drench. 



If in a horse, the catheter (Fig. 14), well oiled, may be gently 

 passed up the penis and the urine drawn off. In a mare, all that 

 is necessary to dilate it is to insert one finger into the neck of 

 the bladder. 



Fig. 14. Horse Catheter, for drawing the urine from the bladder of horses. 



SPASM OF THE NECK OF THE BLADDER. 



This condition consists in a tight closure of the outlet from 

 the bladder by contraction of the small circular muscles that 

 open and close it. 



Causes. Hard, continuous driving, without a chance to pass 

 urine, draughts of cold air when warm and fatigued, extensive 

 blisters of Spanish-fly over the loins, certain medicines, stone in 

 the bladder., and exposure to cold rain storms. 



Symptoms. Frequent .stretching and straining to pass water, 

 without being able to do so. On resuming his natural position, 

 the animal still continues uneasy, paws, shakes the tail, looks 

 back to the flank, kicks at his belly with his hind feet, lies down 

 and rises, and tries to urinate a,s before. With the oiled hand in- 

 troduced into the rectum (last gut), the bladder full of urine 

 may be felt. 



