288 EUPHORBIACE^E 



thicker, and deposits a white, crystalline substance. Ricinolein (the 

 glyceride of ricinoleic acid) constitutes the bulk of castor oil, with 

 small quantities of palmitin, stearin, myristin and an acrid principle. 

 A mild and efficient cathartic. Dose: J4 to 2 fl. oz. (8 to 60 mils). 

 Formerly employed in making flexible collodion, 3 per cent. 

 ADMINISTRATION. Various methods of administration to hide the nause- 

 ating taste have been devised. The three-layer method in which the 



FIG. 165. Crolon tiglium Flowering branch; flower (enlarged) ; seed, entire and in section 



(enlarged). 



oil is suspended between two layers of flavored watery or alcoholic 

 liquid, is the favorite. For this purpose compound tincture of carda- 

 mon, spirit of peppermint, whisky, orange juice, lemon juice, lemon- 

 ade or beer may be used. " The layers should not be stirred together." 

 The favorite drug store method is to place some syrup of sarsaparilla 

 in a glass and cause it to foam by adding carbonated water from the 

 soda fountain or by a little tartaric acid and sodium carbonate. Then 

 the oil is poured in without allowing any to get on the edge of the 



