74 THE p:quine hospital formulary. 



of vitality in the blood-cells themselves, and in certain in- 

 stances this impairment of power may be hereditary in 

 nature. The following prescription for a ball will be found 

 very useful indeed ; but it is well to bear in mind that 

 perhaps the stables may be deficiently or ineffectually 

 ventilated. It should also be remembered that debility 

 may be associated with some very serious disease. 



Ball 



Carbonate of ammonium, qW. 



Citrate of iron and ammonium, ;^i. 



Powdered nux vomica, gr. xxx. 



Gentian, ^i. 



Ginger, ^ii- 



Treacle, a sufficient quantity. 

 One ball should be given once or twice daily. 

 N.B, — Any prescription mentioned under ' Anaemia ' may 

 be given. 



Diabetes Insipidus (Polyuria, or Hydruria). 



The malady to which the above name is given is char- 

 acterized by an excessive secretion of urine, great thirst, 

 anorexia or depraved appetite, emaciation and debility. It 

 is probably caused by a disorder of the vaso-motor centres, 

 leading to a dilatation of the renal vessels, and this inade- 

 quate nerve-control is frequently due to a defective assimi- 

 lation occasioned by improper diet or by local causes or 

 prolonged exertion and exposure to cold. 



The urine is pale and of low specific gravity (about 1003). 

 Change and careful regulation of the diet are essential, and 

 the food should be at first restricted to hay and mashes. 

 Mild aperients should be given, and bicarbonate of sodium 

 or potassium allowed freely in the drinking water. The 



