Chemistry and Physics. 319 
phide, gives flocks of indigo blue—Ber. Berl. Chem. Ges., xi, 
1228, 1296, June, July, 1878. G. F. B. 
7. On Anthrarufin, a third Dioxyanthraquinone.—Scuunck and 
h 
soluble therein e er of these bodies sists, as 
authors have already shown, of two dioxyanthraquinones, anthra- 
flavic acid and metabenzdioxyanthraquinone w 
the powder between two watch glasses, and heating these to 120°- 
30°, an orange-yellow sublimate is obtained in needles. Recry 
tallization from glacial acetic acid gives it pure. Anthrarufin 
yields een fluorescent reduction product. Gives with acetic 
oxide a diacetyl derivative in yellow needles, fusing at 2 
Ber. Berl. Chem. Ges., xi, 1176; June, 1878. G. F. B. 
Fluorescein-carbonic acid.—The remarkable bodies 
Would not act similarly, retaining however, the carboxyl group. 
CO—-—C,H,{OH 
C,H, CO —C'H0 
COOH ° ‘|OH 
and apenas as a light ochre-yellow powder, scarcely soluble in 
water but soluble in alcohol, ether and benzene. i 
Calcium salts were prepared, and also acetyl, dibrom and tetra- 
Tom-derivatives.— Ber. Berl. Chem. Ges., xi, 1340, July, 1878. 
G. F. B, 
