492 ANNUAL EECORD OF SCIENCE AND INDUSTRY. 



commercial sulphuric acid, and dye it, without rinsing in 

 fresh water, with twenty pounds of logwood and twenty 

 pounds of Brazil-wood. It is advantageous for the color to 

 allow the wool to remain in the mordant for twelve hours. 

 5 G, XXXIL, 1875, 256. 



XYLIXDEIX, A NEW DYE-STUFF. 



The name xylindein has been given to a green dye-stuff, 

 examined by Fordos and Rommier, which results as a pa- 

 thological effect oi Peziza cBrugmosa in dyeing wood of the 

 beech, oak, and birch, often to such an extent as to impart a 

 dark blue-green appearance to large blocks. This coloring 

 matter has been extracted from the green-colored wood, by 

 Liebermann, with carbolic acid, and has been precipitated 

 from the dark-green solution in dark-green flakes, by the 

 addition of alcohol or ether. By recrystallization from the 

 solution in carbolic acid it was obtained in small four-sided 

 crystals, of a high coppery lustre. These are insoluble in 

 most solvents, except in concentrated sulphuric acid, with 

 a grass-green color, and in carbolic acid and aniline, with 

 a beautiful dark-green color. No formula can as yet be 

 given for it. 1 C, IV., 1875, 64. 



EOSIX, A NEW FLUORESCENT DYE-STUFF. 



A new dye-stuff has been introduced into the market un- 

 der the name of eos/w, by a German company. It is charac- 

 terized, in solution or upon silk, by a beautiful fluorescence, 

 combininof in a most decided manner beautiful rose and red- 

 dish-brown tints. It consists of glistening greenish scales, 

 readily soluble in water, and of an alkaline compound of a 

 yellow dye-stufl", precipitable by acids. It seems related to 

 the Bavarian phthalic acid dye-stuffs. Meister, of Zurich, 

 employs it instead of litmus in the rapid titration of alkalies, 

 since the disappearance of its beautiful rose color, upon acidi- 

 fication, is much more marked and sudden than the change 

 of the blue of litmus. 8 C, January 7, 1875, 11. 



A NEW ANILINE EED. 



Dr. Isidor Walz has called attention to the discovery of a 

 new coal-tar color which promises to become of importance. 

 It yields shades exactly like those of cochineal, and almost 



