818 Wisconsin Academy of Sciences, Arts, and Letters. 
at 237° as generally given, and that it contains no methoxy 
groups. Also that it does not.reduce Fehling’s solution but 
readily reduces an ammoniacal silver solution, and that it forms 
tetra acetyl, tetra benzoyl, and tetra benzene sulphonal deriva¬ 
tives. Furthermore that when the glucoside datiscin is hydro- 
lized, dextrose, not rhamnose is formed. Also that it is an 
isomer of luteolin and probably a flavone derivative. 
COH 
Datiscetin 
Datiscetin occurs as the glucoside datiscin in Datisca canna- 
bina. It crystallizes in clear yellow needle like crystals which 
melt at 237°. 
II. A. 2.) Pigments referable to phenyletho phenyl methane. 
Phenyl etho phenyl methane 
One pigment of known constitution, eatechin, is referable to 
the above hydrocarbon. Another, cyano maclurin, whose con¬ 
stitution is not yet fully determined is presumably derived from 
the same hydrocarbon. Cyano maclurin is accordingly placed 
with eatechin in this classification. 
