Manganese (Black Oxide.)
Taieri Beach.

A sample of this mineral was forwarded from the Taieri beach, by Mr. Hanning, in November, 1873. It was found to contain 90 per cent. of dioxide of manganese. It is, therefore, an excellent specimen of this valuable mineral. It will be very useful when we shall have established in this Colony the manufacture of chloride of lime and other substances that require for their production free chlorine. This will not be done, however, until we can make our own sulphnric acid.