^72 Dr. Schuuck on Jhthkm%nd its Products of Decomposition. 



Ivh 0*4100 griu., dried in the water bath and burnt with chro- 

 inate of lead, gave 0*7690 carbonic acid and 01 860 water. 

 0*4760 grm., burnt with lime, gave 0*1260 chloride of silver. 



II. 0*4780 grm. of the same, recrystallized from boiling alco- 

 hol, gave 0*8950 carbonic acid and 0*2100 water. 



III. 0*5170 grm. of another preparation gave 1*0270 car- 

 bonic acid and 0*2400 water. 



0*7720 grm., burnt with lime, gave 0*2015 chloride of silver. 



IV. 0*4425 grm. of the same preparation as the last gave 

 0*8320 carbonic acid and 0*1960 water. 



0*5450 grm., on decomposition with fuming nitric acid to 

 which a little nitrate of silver was added, gave 0*1380 chloride 

 of silver. 



V. 0*4975 grm. of a new preparation gave 0*9330 carbonic 

 acid and 0*2240 water. \\ 

 , 0*8580 grm., burnt with lime, gave 0*2180 chloride of silver. 



VI. 0-5320 grm. gave 1*0000 carbonic acid and 0*2380 water. 

 0*9370 grm., burnt with lime, gave 0*2450 chloride of silvefi 

 These numbers correspond in 100 parts to — jb 



I. II. III. IV. V. :VI.50'ik 



Carbon . . 51*15 51*06 51*20 51-27 51*14 51*26: 

 Hydrogen . . 5-04 4*88 4*87 4*92 5*00 4*97 

 Chlorine . . 6*54 „ 6*45 6*26 6*28 6*46 



Oxygen . . 37*27 „ 37*48 37*55 37*58 37*31 

 There are several formulae which give a composition in 100 

 parts agreeing tolerably well with these numbers, but only one 

 which at the same time explains the manner in which chlororu- 

 bian is formed. This formula is C** H*^ ClO^^, which gives the- 

 following composition : — ^■* 



Eqg. 'ii 



: Carbon ... 44 264 50*92 id 



bam Jibc- Hydrogen . . 27 ri:;275uu>m.Y&r^ ba& ^luoloo 

 aok'M-- .Chlorine, .t . .1 85*4 6*8fl'^ r: ....^i^ 



xmj Oxygen . ba^ ,t^ 192 37*06 oi 



618*4 100-00 *»i 



Assuming this formula to be correct, then rubian, when acted'^ 

 on by chlorine, loses 1 equivalent of hydrogen, which is replaced 

 by chlorine, at the same time taking up 6 equivalents of water 

 and sphtting up into chlororubian and sugar, as will be se^^* 

 from the following equation : — ' 



C^H*»0«>+6HO-f2Cl=C44H^C1024 + Ci^IP2 0'2 + ClH. 

 Action of Acids on Chlororubian. — If chlororubian be treated 

 with boiling dilute sulphuric or muriatic acid, it first dissolves 

 to a yellow liquid, but on continuing to boil, the solution sudr * 

 denly becc|me8 milky and dejbbsit? a ferge .q^uantity of yellow ' 



