1 
MANGANESl DBPOSITS OV INDIA. 
Fig. 2. — Piedmontite-gneiss. Pali, Nagpur district, Central Pro. 
vinces. X 23. 
Fig. 3. — Piedmontite and felspar, latter altering to calcite, 
Ghogara, Nagpur district. Central Provinces, x 23. 
Fig. 4. — Piedmontite in crystalline limestone. Ghogara. X 23. 
PLATE II.— Photomicrographs: — 
Fig. 1. — Very fine-grained gondite. Jothvad, Narukot State, 
Bombay, x 23. 
Fig. 2. — Typical gondite. Wagora, Chhindwara district, Central 
Provinces. X 23. 
Fig. 3. — Strained gondite by ordinary light. Ramdongri, Nagpur 
district, Central Provinces, x 23. 
Fig. 4. — Same as fig. 3, but with nicols crossed. 
PLATE 12. — Photomicrographs: — 
Fig. 1. — Gondite, with garnets altering. Ukua, Balaghat district, 
Central Provinces, x 33. 
Fig. 2. — Spessartite-rock, partially converted into manganese-ore. 
Mansar, Nagpur district, Central Provinces, x 23. 
Fig. 3. — Rhodonite-rock. Ramdongri, Nagpur district, Central 
Provinces, x 23. 
Fig. 4. — Pyroxene (Rhodonite ?) altering to manganese-ore. 
Kodur, Vizagapatam district, Madras, x 23. 
PLATE 13.— Photomicrographs :— 
Fig. 1. — Black manganiferous quartzite. Balaghat mine, 
Balaghat district, Central Provinces, x 60. 
Fig. 2. — Black manganiferous quartzite. Manegaon, Nagpur 
district. Central Provinces, x 16. 
Fig. 3. — Vein-quartz being replaced by psilomelane. Chik 
Vadvati, Dliarwar district, Bombay. X 23. 
Fig. 4. — Quartz felspar-rock being replaced by manganese-ore, 
Garbham, Vizagapatam district, Madras, x 23. 
PLATE 14. — Piedmontite and manganese-ore nodules in a piedmontite-Hme- 
stone. Around the manganese-ore nodule is a thin rim of 
piedmontite. | natural size. 
PLATE 15. — Pyrolusite (dark) and calcareous tufa (light); from Pan Kuan, 
Dhar Forest, Central India. ^ d atural size. 
PLATE 16. — Map of the chief occurrences of manganese-ore in India. Scale 
1 inch =256 miles. 
PART IV. 
PLATE 17. — Fig. 1. — Inclusions of manganese-ore and manganese-si licate-rccks 
in porphyritic biotite-granite. Jothvad, near Jambughoda, 
Narukot State, Bombay. February 1905. 
