1056 
MANGANESE T7EP0SITS OF INDIA : DESCRIPTIVE. [PaRtIV: 
These gravel deposits have been worked for several years, 
but as the figures for the Kodur mines are 
usually grouped together, I do not know- 
how much ore has been won at Garividi. The figures for the i-wo 
years for which I have been able to obtain separate figures are as 
follows : — 
Year. Long tons. 
1899 . . .... 1,974 
1900 . ... . . 1,978 
The best braunite in the Vizagapatam district comes from 
Garividi. Some specimens can be obtained in 
which single cleavage faces of the mineral 
are 3 inches across. 
Nature and quality of 
the ores. 
One piece of this braunite (A. 345) was analysed completely by 
Messrs. J. & H. S. Pattinson with the result given in full on page 68, 
where it is shown that the analysis corresponds to the formula 
15Mn203. 4MnSi03 for this particular piece of braunite. The consti- 
tuents of commercial importance are as follows : — 
Specimen No. A. 345 
Manganese 
Iron 
Silica (total) . 
Phosphorus . 
Moisture 
51-88 
9-90 
8-25 
0-031 
•25 
Another picked piece of ore composed of fairly coarse granular 
braunite with a specific gravity of 4"67 (and therefore prol ably contain - 
ing a little admixed psilomelane) was also subjected to complete analysis 
by the same analysts : — 
