Dr. Schunck on Ruhian and its Products of Decomposition, %77 



0*3090 grm., dried at 100° C. and burnt with chromate of 

 lead, gave 0-6090 carbonic acid and 0*1060 water, corresponding 

 in 100 parts to — 



Carbon .... 53-75 

 Hydrogen. . . . 3*81 



The formula C^^ H^^ CP Q^^=zQ^^ W^ CP O^-f HO requires in 

 100 parts— • -:,edJi77T -b: 



M-,..-.^-, .:= -.- Carbon -^rrT^fyrif ,.; ;» ^.^^*9Q,,;^ .^^i , ,..<■r^o■■ 

 on' mmimi> fiin Hydrogen . Jn^^tytrfiut iS'^Itihbe off<t iv^ ^^^ 

 ,**3'/i- ti aorri? Chlorine, .j.^ m«isio- 19-89 ., .^jj^f 

 ^rrr>rf ,p^pp|.h> fi Oxygen, a,.«;|.^r i,.;t,. 22*50 ,r..f; «.r,> 



I may mention by the way, that the brown resinous substance 

 which, as 1 stated above, is formed in small quantities along 

 with chlororubian by the action of chlorine on rubian, is very 

 similar both in properties and composition to this substance. 

 It was prepared simply by passing chlorine through a solution 

 of rubian, collecting the yellow flocks which were formed in the 

 first instance separately, washing them with water, and treating 

 with cold alcohol. The filtered solution was evaporated to dry- 

 ness, when it left a resinous substance resembling rubiretine. 



0*4] 30 grm. of this substance, dried in the water-bath, gave 

 0*8200 carbonic acid and 0*1500 water. 



0*3010 grm., burnt with lime, gave 0*2160 chloride of silver. 



These numbers correspond in 100 parts to — -i r^i-i'jo -^mhiit'i-i 



-iD&iqVi bfi,6 iit TT 1, ' u f b^MosaiB t)(? J>i^i^ dtrw nsib^rfk^^^ 



■j^^.n -jp.f ...:rv.r.: ^xygen,.^ .p^ .^.^ ..^._. ^^Kyi)r^^^^^^^^ F,o..c... ^J 

 .' By the action of chlorine on chlororubiadine, a body very 

 similar to these but dififering in composition is formed. If finely 

 pounded chlororubiadine be suspended in water and a stream 

 of chlorine gas be passed through the liquid for some time, tiie 

 powder becomes lighter in colour, but not white. If it now 

 be collected on a filter, washed with water, and treated with 

 boiling alcohol, it dissolves in the latter, forming a yellow solu- 

 tion, which deposits nothing on cooling, but on evaporation 

 leaves a transparent dark yellow amorphous substance like resin, 

 which remains soft for a long time, and only becomes bard and 

 brittle after being heated in the water-bath for some time. 

 This substance, when heated on platinum, burns with a yellow 

 flame, leaving much charcoal. When heated in a tube, it melts 

 and gives acid fumes and a yellow oily sublimate, in which on 

 cooling some white crystals make their appearance. The alco- 

 holic solution gives no precipitate with nitrate of silver, but 



