LIST OF PLATES. 
Part l 
PLATE I. — Photomicrograph by reflected light of a polished and etched slice 
of manganese-ore from Ramdongri, Nagpur district, Central 
Provinces. xl6. 
PLATE 2. — Mass of braunite crystals from Lohdongri, Nagpur district, C -n - 
tral Provinces. | natural size. 
PLATE 3. — Pyrolusite from Pali, Naapur district, Central Provinces. ^ 
natural .size. 
PLATE 4. — Dendrites of manganese oxide on Upper Vindhyan Sandstone, 
Panna, Central India, i natural size. 
PLATE 5. — Fig. 1. — Stalactitic psilomelane from Garbham, Vizagapatam 
district, Madras. | natural size. 
Fig. 2.— Reniform psilomelane from Garbham, Vizagapatam 
district, Madras. ^ natural size. 
PLATE 6. — Fig. 1. — Psilomelane showing conchoidal fracture, Tekrasai, 
Singhbhum district, Bengal (J. 917). Natural size. 
Fig. 2. — Mamm'Uated psilomelane from Guguldoho, Nagpur dis- 
trict. Central Provinces. J natural size. 
PLATE 7.— Spessartite crystals (trapezohedral) with interstitial quartz, on a 
basis of manganese- ore. From Waregaon, Nagpur districtt 
Natural size. 
Part ii. 
PLATE 8. — Photomicrographs: — 
Fig. 1. — Opalized kodurite. Kodur, Vizagapatam district, x 16. 
Fig. 2. — Opalized kodurite with some orthoclase remaining. 
Boirani, Ganjam district, Madras, x 16. 
Fig. 3. — Apatite-spandite-rock. Kodur. x 16. 
Fig. 4. — Spandite f manganese-garnet), in psilomelane. Rama- 
bhadrapuram, Vizagapatam district, x 23. 
PLATE 9. — Banded hematite-quartzite ; from Khatola, Jabalpur district. 
Central Provinces. The jaspery quartzite bands appear white in 
the photo, but are really pinkish. Natural size. 
PLATE 10. — Photomicrographs: — 
Fig. 1. — Fine-grained quartzite being replaced by manganese-ore. 
Sivarajpur, Panch Mahals district, Bombay, x 23. 
