LANOLINE. 613 



Only green crystallised sulphate of iron should be employed for 

 internal use. The impure kind will do for disinfection. 



Dialysed Iron. 



A solution of dialysed iron {\ oz.) diluted with water, to be 

 given two or three times a day, is a valuable tonic, and is not 

 liable to act injuriously on the digestion, or on the liver (when 

 affected) like sulphate of iron. 



Tincture of Iron. 



The strong tincture of the perchloride of iron (liquor ferri 

 perchloridi fortior) appears to act, when given internally, as an 

 astringent to the walls of the blood-vessels ; hence its use in 

 bloody urine, et€. In such cases, it can be given in one-third 

 drachm doses three times a day. For diarrhoea, give in a pint of 

 water, 1 drachm twice a day, combined with IJ ounces of lauda- 

 num. Externally, it is useful for stopping bleeding. 



The ordinary tincture of iron (tincture of steel) is made by 

 mixing 1 oz. of the strong tinctm'e with 3 oz. of distilled water. 



Kerosene Oil. 



See "Paraffin Oil." 



Lanoline 



is the grease obtained from sheep's wool. It forms a useful 

 vehicle for applying medicines to the skin. For its action as a 

 hoof ointment see p. 204. 



Lard 



is one of the best materials for making up ointments. Its 

 tendency to become rancid can b© coiTected by melting it over a 

 water bath and adding a fiftieth part of benzoin. Pure benzoated 

 lard can be obtained ready made from any chemist. The usual 

 adulterations of lard are water, salt, starch, and cotton seed oil. 

 Mutton, venison, or beef kidney fat, horse fat, lanoline, goose 

 grease, or vaseline, may be used instead of lard. To give any 

 of these consistency in hot weather, we can mix with them a 

 little beeswax. 



Laudanum, 



§ee " Opium, Tincture of," 



