3. The loss of potash and soda by volatilization and combination with
the gangue is entirely avoided.
4. It is not actually necessary to use rich ores; silicious ores can
be used.
5. The intimate mixture of the material before treatment being made
mechanically, the puddling is avoided, and in consequence a greater
proportion of the sesquioxide of chromium in the ores is
utilized.--_Bull. Soc. Chem._ 5, 371.
* * * * *