34 Brush and Dana— Fairfield County Minerals. 
himself before our first visits to Branchville. These have 
careful in obtaining the best results possible in the explorations 
of which they have taken charge. 
Brief general description. 
1 the minerals which we have obtained are from a single 
vein of albitic granite, and the line along which the explora- 
tions have been carried does not exceed twenty feet. The 
general description of the vein and of the minerals which com- 
pose it—with the exception of the manganesian phosphates 
and the immediately associated species—we reserve for a later 
paper; we will mention, however, that outside of these we 
have identified the following ‘species :— 
Albite, quartz, microcline in large masses, a hydro-mica near 
damourite having a peculiar concentric spherical structure, 
spodumene in crystals weighing one to two hundred pounds, 
cymatolite as a result of the Rae goes of spodumene 
crystals, sometimes nine inches in width, apatite, microlite (sp. 
gr. ~ 6), columbite (sp. gr.=56), apatite, Satna tourmaline and 
staurolite. 
The manganesian phosphates and related minerals occur in 
nests imbedded in the albite. A single deposit yielded almost 
all the material obtained, it being probable that what came out 
as the result of our work was a part of the same body of mine- 
rals which Mr. Fillow had blasted into two years before. A 
second deposit will be mentioned later as having furnished the 
lithiophilite. 
The minerals which form the mass of the first mentioned 
bed are :—Kosphorite, dickinsonite, triploidite and rhodochro- 
site. Of these, the first three are new and are described at 
length in this paper. These four minerals, together with 
artz, occur associated in the most intimate manner possible, 
it being not at all unusual to find all of them in a single hand 
specimen. This is especially true of the three new minerals: 
the eosphorite is often found in crystals entirely imbedded in 
the dickinsonite, and again the finely disseminated plates of 
dickinsonite give a green color to much of the massive 
eosphorite. & 1 i 
eosphorite, thus giving it a very anomalous appearance ; it also 
Sens the mass in wee the triploidite crystals are imbed- 
iia lr eae ” 
