114 THE ARMY IIOKSE. 



Ni(.x vo7mca, 'pov^dered. — A nerve stiimilant and tonic. Dose, 

 ^ to 1 dram. It is a very useful tonic in building U}) the tone of 

 the system in convalescence from debilitating diseases and 

 general lack of vitality. Generally given in combination with 

 gentian, iron, and other tonics. 



Oil^ linseed. — Laxative (mild purgative). Dose, ^ to 1 quart. 

 Do not use boiled oil. 



Oil^ olive. — Generally used as a vehicle in making liniments 

 and oilv solutions. 



Oil of tar (pine tar). — Useful for plugging holes and cavi- 

 ties in the hoof after all suppuration has ceased. 



Oil of turpejifine. — Diuretic, stimulant, antispasmodic, ver- 

 mifuge, and expectorant. Dose, 1 to 3 ounces diluted with oil. 

 Externally it is used in the formation of liniments (see Solu- 

 tion of Ammonia). 



Ophnru tinctm^e of (laudanum). — Anodyne, antispasmodic. 

 Checks secretion of mucous membrane. On account of these 

 properties it is a valuable remedy in diarrhea and dysentery. 



Very useful in the treatment of all abdominal pain where 

 there are no symptoms of constipation, but as a rule belladonna 

 and cannabis indica are preferable. Dose, 1 to 2 ounces. 



Externally, opium tincture is used to relieve pain of sprains 

 and bruises. 



A v^ery good anodyne lotion is made as follows: 

 Opium tincture, 4 ounces. 

 Acetate of lead, 2 ounces. 

 Water to make 1 quart. 

 Apply every few hours. 



Opium, powdered.— ^ot used externally. It is used inter- 

 nally for the same purpose as the tincture. Dose, ^ lo 2 drams. 



Potassivm bromide. — Nerve sedative. Dose, ^ to 2 ounces. 

 In tetanus this medicine can be given in large doses. 



Potassium nitrate (saltpeter).— Alterative, febrifuge, and 

 diuretic. Dose, 1 to 4 drams. In the treatment of laminitis the 

 dose is 2 to 4 ounces, repeated three times a day. Externally it 

 makes a good cooling lotion : 



Nitrate potassium (saltpeter), 5 ounces. 

 Chloride of ammonia, 5 ounces. 

 Water 16 ounces. 

 Mix and keep the affected parts saturated with this lotion. 



