Feculas. 167 



potato starch is sold for it. — East Indian arroiu root. From 

 Curcuma angustifolia. 



Potato starch. From raw potatoes, especially those which 

 have been spoiled by frost ; very white, globular, crimp, friable, 

 heavy : when held towards the light it has shining particles in it ; 

 dissolves in boiling water as easily as arrow-root: 1001b. of 

 potatoes, yield lOlb. to 141b. of starch ; sold for arrow-root, and 

 German rice flour. — Potato flour. Potato farina. From boiled 

 potatoes, not soluble in water; manufactured into sago, salep, 

 maccaroni, vermicelli, semolina, tapioca. 



Portland island sago, Gersa serpentaricB, Ceinissa serpen- 

 taricB, Fecula ari maculati. From the root of Arum maculatura ; 

 prepared in the isle of Portland, and sold to the sick at Wey- 

 mouth. 



China-root starch. From Smilax China, reddish. 



Aloe starch. From some species of aloes. 



Water-lily starch. From the root of the yellow water 

 lily. 



LicTA. A kind of starch procured from the roots of several 

 species of Alstrcemeria, in Peru. 



All the above species of starch are prepared in a manner similar 

 to that of wheat or potatoes, and others may be made from dif- 

 ferent roots or seeds ; they are all nutritive. 



IxuLix. A white farinaceous powder that settles as the 

 decoction of elecampane roots cools : dissolves in water, but does 

 not remain united, separating again as the water grows cold. 



Sago. Prepared from the trunk of the sago tree, and several 

 other kinds of palm trees, by splitting it, bruising the logs in 

 water to separate the fecule, pouring off the water, letting it 

 stand to settle : when the sediment is half dried in the air, it is 

 granulated by being passed through a coarse sieve, and the drying 

 finished first in the sun, and then by fire : a single tree yields 

 from three to four cwt. of sago : from the East Indies, dark red ; 

 highly restorative. 



Yam 8Ac;o, West Indian sa(/o. From the roots of Dioscorea 

 sativa. — Muw/o sat/o. From the seeds of Phaseolus mungo. — 

 Wliite m(jo, French sayo. From kidney beans, or haricots. 



Cassava bread. From the root of Jatropha manihot, by 

 expression of the juice, and baking the cake that is left ; also from 

 Yucca gloriosa. 



Tapioca. From the root of Jairopha manihot, by washing 

 the root, and thus preparing a fecule from it, which, when dried, 

 is sprinkled with a little water and steamed, so as to form viscid 



