Chap. VTIT. ] 
A MANGANESTAN PHOSPHATE. 
207 
Gdya district, Bengal. Uraninite (pitcliblende), uranium-ochre, and 
torbernite, are found at the same place as the triplite.^ The mineral 
was first found by Kishen Singh of the Geological Survey and identified 
by Dr. T. H. Holland. 
The Indian specimens show various shades of dark brownish black, 
but are occasionally lighter brown. They have horny lustre. One 
mass is eleven inches long and weighs forty-one lbs., this including a very 
small amount of attached quartz. 
A Manganesian Phosphate. 
At Branchville in Connecticut, U. S. A., is a vein of albitic granite 
containing a most remarkable series of manganesian phosphates: — dick- 
insonite, eosphorite, fairfieldite, fillowite, hureaulite, lithiophilite, natro- 
philite, reddingite, triphylite,^ triplite, and triploidite. Considering 
the abundance of phosphorus in the form of apatite in the manganese- 
silicate-rocks of India, one would expect a careful search to lead sooner 
or later to the discovery of a similar series of manganiferous phos- 
phates. Apatite, and consequently phosphorus, is most abundant in the 
rocks of the kodurite series of Vizagapatam ; but up to the present, with 
the exception of manganapatite, no manganesian phosphates have been 
found in these rocks. In the rocks of the gondite series at Jothvad in 
Narukot, Bombay, apatite is also very abundant ; but it is unaccompanied 
by any other phosphates, as fai as has been at present ascertained, 
although there are minerals at this deposit that have not been at present 
identified and of which no mention is made in this Memoir. In the rocks 
of the gondite series in Jhabua and the Central Provinces on the other 
hand, apatite is usually much scarcer, although sometimes found in 
abundance. At one locality, namely Chargaon in the Nagpur district. 
Central Provinces, a different phosphate is found. It occurs in a very 
beautiful rock composed of orange spessartite trapezohedra up 
to g to J inch in diameter, set in a martrix of rose-pink rhodonite 
in plates sometimes an inch in diameter. With the rhodonite is 
mixed a varying proportion of barytes and an oil-green mineral. 
In some places the latter mineral is present in some abundance. It 
occurs in irregular patches sometimes an inch in diameter. It just 
scratches apatite and so can be considered to have a hardness of 5 - 5"5. 
Its specific gravity as determined by means of Sonstadt's solution is 
1 T. H. Holland, Mem. Geol. Surv. Ind., XXXIV, pp. 32, 51, (1902). 
2 See a series of papers by O. J. Bru'^h and E. S. Dana in the Amer. Jour. Sci.. 
Vols. 1618, 39, years 1878-1879, and 1890. 
