Reviezv of Recent Geological Literahire. 175 
1.74 per cent, of lead, gives the formula CaMnSiOi, which places it 
next to monticellite in the chrysolite group. The name is from the 
Greek meaning blue green color. 3. Nasonite. This is a white 
massive mineral with greasy to adamantine lustre, hardness about 4, 
specific gravity 5.425, and usually shows numerous inclusions of 
axinite, garnet, and glaucochroite. Its crystallization is probably 
tetragonal, though this could not be proven. The analyses show 
the general formula to be RioCLSicO-i, in which R is mostly lead and 
calcium. Allowing for a few particles of clinohedrite that were 
noticed intimately associated with the nasonite the empirical for- 
mula PboCa4CL(Si.07)3 or Pb* (PbCl)/. Ca^CSi.OT)^ is obtained. It 
is named for F. L. Nason, West Haven, Conn. 4. Leucophoenicite. 
This mineral which is conspicuous on account of its light purplish- 
red color, occurs in small crystalline masses having vitreous lustre, 
hardness 5.5-6, and specific gravity 3.848. The system of crystalliza- 
tion could not be determined but is probably inclined. The analyses 
gave the formula R5(R.OH)2'(Si04)3 in which R is mostly Mn, but 
with some Zn and Ca. Structurally it is the exact equivalent of hu- 
mite. The name is from the Greek meaning pale purple-red. 5. 
Chemical Composition of Ganomalite. From a study of analyses, 
and of the analogous mineral nasonite, the authors are led to discard 
the formula Pb3Ca:;Si30ii for ganomalite and to substitute the formula 
Pb4(Pb.OH)2Ca2(Si207)3. Both nasonite and ganomalite are salts of 
the acid HGSi207. which is intermediate between the orthosilicic acid 
H4Si04 and metasilicic acid H2Si03. The name mesosilicic acid, (meso 
from the Greek, meaning between), is suggested for this intermediate 
acid in place of Groth's name diothosilicic acid, which the authors 
consider inappropriate as the acid in question is not an othosilicic 
acid, as the name would signify, but is a derivative of orthosilicic acid. 
M. L F. 
Andesites of the Aroostook Volcanic Area of Maine. By Her- 
bert E. Gregory. (Am. Jour. Sci., 158, 359-369.) 
The paper includes descriptions of the field relations and petrog- 
raphy of the andesyte area in the towns of Chapman, Mapleton, and 
Castle Hill, Aroostook county, Maine. The andesytes are Paleozoic 
lava flows and breccias, with their associated tufTs, lying upon the 
upturned edges of Silurian sandstone. The augite and hornblende 
types predominate, but stages between andesyte and trachyte, and 
also dacyte facies are sometimes found. Exhaustive analyses show 
the Maine andesytes agree with the types of their class. No more 
alteration is found than in many of the comparatively recent flows. 
M, L. F. 
On a new mode of Occurrence of Ruby in North Carolina. By 
J. W. JUDDandW. E. Hidden. Crystallographic Notes by J. II. 
Pratt. (Am. Jour. Sci., 158,370-381.) 
The Cowee district, which is the locality of the rubies described, is 
in Macon county, a few miles north of the town of Franklin. The 
rubies occur mostly in tabular rhonibohcdral or short prismatic crys- 
