MR. SCHUx\CK ON RUBIAN AND ITS PRODUCTS OF DECOMPOSITION. 419 
duct of substitution of rnbian, still it retains some of the properties of the latter; 
for instance, that of giving, with alkalies, products of decomposition differing from 
those formed by acids. In all the processes of decomposition previously described, 
rnbian is decomposed in no less than three different modes, just as if it were a com- 
pound or mixture of three different bodies, whereas, when acted on by chlorine, it 
yields only one series of products. It behaves in the latter case as if it were simply 
a conjugate compound containing sugar. It splits up into sugar and a chlorinated 
body, and the latter, by the action of acids, again splits up into sugar and a second 
chlorinated compound. This series of products corresponds exactly with one of 
the three series in the other processes of decomposition, the bodies belonging to 
the two other series not making their appearance even in the form of products of 
substitution. 
