587. Starch is insoluble in cold sles and with warm 
forms a sort of transparent jelly. It is also insoluble 
alcohol. When boiled in very dilute sulphuric acid, upon 
ering and evaporating the solution after the acid has been 
ized by lime, the starch is found to be converted into 
a substance of a saccharine nature. This conversion of starch 
ito ae takes place spontaneously in germination and in 
ig. Starch consists of : 
Carbon, : 3 vo 43.55 
Oxygen, YS rae 49.68 
Hydrogen, . e . ° 6.77 
100 parts 
_ and a little saline and earthy matter. Proust found in Bar- 
ley a peculiar principle which he called Hordein ; this Dp 
nm regards as a modification of starch, =” 
588. Starch is contained in a great number of vegetable 
‘substances, and principally in seeds and tuberose roots. — wf 
is found in the roots of Bistort (Polygonum bistorta), White 
ae (Bryonia alba), Burdock (Arctium Lappa), Crow 
foot (Ranunculus bulbosus), Broad-leaved, Sharp. polaiall 
and Water-Dock (Rumex obtusifolius, R. acutus, and R. 
aquaticus), Dropwort, (Spirea filipendula), Earthnut (Bu- 
nium bulbocastanum), Dwarf and Common Elder (Sambucus. 
Ebulus and S. nigra), Henbane (Hyoscyamus niger), Tris” oe 
autumnale), Masterwort (Imperatoria ostruthium), ; 
Spore (Atropa belladonna), Orchis morio, O. a 
