484 Scientific Intelligence. 
quently, the formula C, he Or which the author regards as pro- 
visional only. The so and ammonium salts are well crys- 
tallized. The acid has aoe been obtained from the leaves of the 
quince, apple, ig almond, banks lilac and eines 
Bull. Soe. Ch., T, xxvii, 148, Sept., 18 
6. On the Constitution of Buwanthon. cases and Wr ICHEL- 
HAvs have experimented to determine the constitution of euxan- 
eibaiion sy. wa It has t g cameos C, tl 0, Its vapor 
passed over zinc sae wder in a current of rogen ‘gave the 
product O. This, oxidized with nitric acid or permanganate 
aye C,,H,0,; treated with fu uming nitric acid, gave a nitro-pr ae 
C,,H,Br,O and CG. Hbr,O; e 
rae wee wie acetyl chloride to 100° gave diacet yleuxanthon, 
HC, ; From these reactions, taken in connection wit 
po fact ern ‘. obtained a hydroquinone- -like body on reduc- 
tion with sodium amalgam, the author regards euxanthon as a 
C,H. 
carbonein of hydroquinone CO “te >O. , the reduction product 
OF ee 
with zine being carbodiphenylene CO Sale nei >, giving on oxidation 
pa a a a oxide CoG uP >O.— Ber. Berl. Chem. Ges., x, 
1397, Oct., oe 
rf Secs a ‘Vapors. —- One of the most important of ies recent 
additions to chemical methods is that of Victor Meyer for deter- 
mining the density of the vapor of substances which have a high 
boiling point. As in the method of Gay-Lussac or in the modifi- 
cation of that method as employed by Hoffman, a given weight of 
the substance used is converted completely into vapor and the 
volume of this vapor measured under determinate conditions. An 
ut varying dineala noi Bs with the seen of the vapor to be deter- 
e glass having been weighed to decigrams and the material 
introduced, the interior is or at | 100° . with W 00d’s ‘fusible 
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