ALOES 



89 



soluble in 60 per cent alcohol or in water at 100 C. On cooling the 

 latter solution there separates from 40 to 60 per cent of the so-called 

 " resin of aloes," which is soluble in alkalies with a red color and is 

 reprecipitated on the addition of acids. About 36.6 per cent of aloes 

 is soluble in chloroform, and from 4 to 5.5 per cent in ether, the 

 solution being of a yellow color. It should contain not more than 

 8 per cent of moisture and yield not more than 4 per cent of ash. 



FIG. 34. Original packages of Curasao Aloes. 



Davis & Co. 



After a photograph by Parke, 



Zanzibar Aloes is a hepatic (or liver-colored) variety of'Socotrine 

 Aloes, produced by slowly evaporating the juice of the plant. It 

 comes into market frequently in monkey-skins, has a dark-brown 

 color, a dull, waxy fracture, and a nearly smooth, even surface. It is 

 crystalline under the microscope and forms a reddish-yellow powder 

 that is colored dark yellow with nitric acid. 



