COLOR OF PLANTS AND FLOWERS. 43 
ing, and he uniformly found that ‘the flower would differ 
from the paper in being more yellow, or more pink, or 
more blue, or in some other way. White Campanulas be- 
come blue when they are dried; infusions of white flow- 
ers in alcohol have always a perceptible tinge. Flowers 
which are white, verging upon yellow, yield infusions which 
alkalies bring to a more positive brown; infusions of those 
which are white, tending to blue or red, become light red 
by the action of acids, and greenish by the action of al- 
kalies.” 
“Infusions of yellow flowers in alcohol are of a clear 
yellow, without the flowers losing much color. Acids pro- 
duce no other effect in these infusions than to weaken their 
color slightly. Alkalies make them more brilliant or 
browner.” 
“Blue flowers produce, in alcohol, infusions either of a 
clear blue, as those of flax, or very dark, as in the case of 
the Aconite and the Larkspur. By the addition of acids 
they become red, and of alkalies green. Those which are 
colored red by acids, will not recover their blueness by the 
addition of alkalies, as sometimes happeus to infusions of 
red flowers. Macaire having seen a red infusion of violets 
regain by degrees the natural blue of those flowers, by the 
addition of a vegetable alkali, such as quinine or strych- 
nine, suspects that the color of the violet depends upon 
the combination of their chromule with some alkali. 
Schubler and Funk assure us that the infusion of the Blue 
Day Lily (Funkia corulea,) treated with an acid, will 
present, in the same glass, all the tints of the colored 
spectrum. Blues are among the most changeable colors 
in vegetation, passing freely to white, and to different tints 
of violet and red.” 
“From what has now been stated, it appears to result 
that modifications of chromule are the cause of the di- 
versity of colors; and that these modifications depend 
