368 S. L. Penfield—A patites containing Manganese. 
masses imbedded in feldspar; occasionally the form of the 
short prism is distinct. The white variety is usually in erys- 
tals; these crystals are short prisms combined with the pyra- 
midal and rough pinacoid planes. The prismatic planes have 
a fibrous appearances although they are polished and very 
following analyses will show. 
was led by the discovery of manganese in the apatite 
from Branchville, to examine the same mineral occurring at 
Franklin Furnace, New Jersey ; manganese was also found to 
be present in it. This apatite occurs in crystals of a light 
apple-green color imbedded in calcite, from which they are 
readily separated 
The material employed in the four analyses, given below, 
was as follows :—Analysis 1 was made of a dark green variety 
from Branchville, the darkest that was found. It has a vitreous 
luster, appearing black by reflected light, but a beautiful dark 
green by aaa light. Only clear transparent fragments 
te 
No. 1. Specifie gravity, 3°39. 
an, 
L II. e: 
P.O 41°60 41°66 41°63 2°93 1 
pe “17 “TT 
40°31 40°31 720). 2-97 
MnO 10°59 10°59 149 t 869 
Ca 3°29 -082 28 
F 3°20 3°04 3°12 “164 “56 
Ch 03 03 “000 
