502 SEC. 13. - CHEMISTRZ. 



2441. Aurin and Derivatives. 14 specimens. 



C. Schorlemmer, F.R.S., and R. S. Dale, B.A. 



Two specimens of commercial aurin. 



Three specimens of pure aurin crystallised from alcohol. 



Four specimens of pure aurin crystallised from acetic acid. 



One specimen of compound of aurin and sulphur dioxide. 



One specimen of aurin-potassium sulphite. 



One specimen of leucaurin. 



One specimen of triacetyl-leucaurin. 



One specimen of red aurin or peonin. 



2485. Organic Compounds relating to the dry distillation of 

 the " Galipot " resin, and to the constitution of pimaric acid (per- 

 sonal researches of the author). Gustave Bruylants, Louvain. 



2486. Organic Compounds relating specially, 1 to the 

 question of isomerism in glycerin derivatives ; 2 to indicate the 

 trialcoholic character of glycerin ; 3 to show the reciprocal rela- 

 tions of allium compounds with glycerin compounds; 4 to 

 propargylic compounds, and to the relations of allium compounds 

 with propargylic compounds ; 5 to binary compounds of allium ; 

 6 to the binary propargylic compounds, and their relations with 

 binary compounds of allium ; 7 to the structure of the addition- 

 products of hypochlorous acid. 



Certain groups of these products are intended show : 8 the 

 alcoholic character of alcohol acids, of basic ethers, and polyatomic 

 alcohols, &c. ; 9 the stability of the groupings Oxy-alcoholic Cn, 

 H O in presence of PC1 5 , PBr 5 , &c., in opposition to the ener- 

 getic reaction to which the corresponding hydro-oxygen compounds 

 (O H) are subjected on the part of these re-agents, &c., and as a 

 consequence the synthesis of oxalic acid, &c. 



Louis Henry , Louvain. 



2487. Mono-benzyl Urea, obtained by the action of ammonia 

 on isocyanate of benzyl. Crystallized from water. (See Journal 

 of Chemical Society, June 1872.) 



Formula CO { ^^ 7 



Dr. E. A". Letts and Mr, J. Fulton. 



2488. Isocyanurate of Benzyl, obtained by the action of 

 chloride of benzyl on cyanate of silver. Crystallized from alcohol. 

 (See Journal of Chemical Society, June 1872.) 



Formula (C^^- NCO) 3 



jDr. E. A. Letts and Mr. J. Fulton. 



2489. Benzyl-phenyl Urea, obtained by the action of 

 aniline on isocyanate of benzyl. The compound is unstable. 

 (See Journal of Chemical Society, June 1872.) 



Formula CO 



Dr. E. A. Lefts and Mr. J. Fulton. 



