190 DESCRIPTIONS OF MINERALS. 
Wad.—Bog Manganese. 
Massive, reniform or earthy ; also in coatings and dendri- 
tic delineations. Color and streak black or brownish black. 
Lustre dull, earthy. H.=1-6. G.=3-4. Soils the fingers. 
Composition. Consists of manganese dioxide, in varying 
proportions, from 30 to 70 per cent., mechanically mixed 
with more or less of iron sesquioxide, 10 to 25 per cent. of 
water, and often several per cent. of oxide of cobalt or cop- 
per. It is formed in low places from the decomposition of 
minerals containing manganese. Gives off much water 
when heated, and affords a violet glass with borax. 
Obs. Wad is abundant in Columbia and Dutchess coun- 
ties, N. Y., at Austerlitz, Canaan Centre, and elsewhere ; 
also at Blue Hill Bay, Dover, and other places in Maine; ‘ 
at Nelson, Gilmanton, and Grafton, N..H.; and>im: many 
other par ts of the country. 
It may be employed like the preceding in bleaching, but 
is too impure to afford good oxygen. It may also be used 
for umber paint. 
Lampadite, or Cupreous Manganese. A wad containing 4 to 18 per 
cent. of copper oxide. 
Triphylite. 
Trimetric. In rhombic crystals, massive. Color green- 
ish gray to bluish gray, but often brownish black externally 
from the oxidation of the manganese present. Streak 
grayish white. Lustre subresinous. H.=5. G.=3'54-3°6. 
Composition. (Fi, #R)s Os Ps, in which KR stands for Fe 
and Mn. A Bodenmais specimen afforded Phosphorus 
pentoxide 44°19, iron protoxide 38°21, manganese protoxide 
5°63, magnesia 2:39, lime 0°76, lithia 7°69, soda 0°74, ye 
ash 0:04, silica 0°40=100°05. B.B. fuses very easily, color- 
ing the flame a beautiful red, in streaks, with a pale bluish- 
green on the exterior of the flame. Soluble in hydrochlorie 
acid. 
Obs. Found at Rabenstein in Bavaria; in Finland ; at 
Norwich, Mass.; Grafton, N. H. 
Lithiophitite. A salmon-colored manganese-lithium phosphate, ai- 
lied in composition to triphylite, but containing very little iron. 
From Redding (near Branchville Depot), Conn. 
