arkeus when it is shaken'with alcoholic perchloride of iron, 9 ~ 
and turns dingy blackish brown when gently heated with it. 
Under the same name Wiedemann has described a principle a 
_ obtained from unripe oranges differing from ordinary Hesperi- . 
elt in some respects, especially in being insoluble in alcohol. 4 
| Hesper etn forms crystals melting at 223° C., soluble both im 
sles or ether, not in water; they taste sweet. They are 
split up by potash into Dhidroplacih and ‘Hesperetic acid, C'® 
‘H?® O*. On addition of ferric chloride, thin slices of the 
peel are darkened, owing probably to some derivative 
hesperidin or to hesperidin itself. The name hesperidin has’ 
_also been applied to yellow crystals extracted from the Pomelo, vs 
Citrus Naveiak aot Iinn., the dried flowers of which afford 
2 per cent. of this ‘Substance. It is, as shewn in pM. 
a 
ve; 3; he calls Naringin, and assigns to it the fort n 
0:3 H* O'?+4 OH2. Naringin is teadily soluble in hot wa 
or in alcohol, ey in ether or chloroform. Its solatioue turn 
brownish red on addition of ferric chloride. Lemon juice m 
A dition to citric acid contains 3 to 4 per cent. of gum and 
ar, and 2:28 per cent. of i inorganic salts, of which, accord- 
t fermentation it should be heated, -strai 
ent pad, Stored in — filled bo ttle: 
