42 C. Friedel and J. M. Crafts on Etherification. 
and reformed as long as any alcohol remained. The iodhydrie 
acid would also decompose a certain portion of the ether formed, — 
in the same manner as it decomposes an alcohol, but less readily. 7 
It is not necessary to suppose that the decomposition and re- 
composition of the iodid are dependent upon successive reac- 
tions; it is on the contrary certain, that at any given moment all 
the above mentioned reactions take place simultaneously, and _ 
that the mass of eac y entering into them at that moment 
determines the relative amount of their products, 
The fact that the principal product of the reaction of the iodid — 
: yo 
erty, which the chlorids, bromids and iodids o 
cals, as well as of metals, possess, of transforming an unlimited 4 j 
of a simple ss a founded on known ch 
there is reason to hope that the name catalysis will eventually _ 
be banished from scientific language by eee stady. Of ‘the 
sor Wurtz. 
Paris, March Ist, 1865. 
* Ann, de Chim. et Phys., 1856, 
