28 ANALYSES OF ROCKS AND MINERALS, 1880-1908. 
Analysis by H. N. Stokes, record No. 1491. The FeO represents the total iron, 
because the sulphides present, possibly as pyrrhotite, prevent the separate estimation 
of the two iron oxides. 
B. Syenite, Fort Ann, Washington County. Adamellose. Contains orthoclase, 
microperthite, hornblende, green augite, and a little quartz. 
C. Quartz-biotite-gamet gneiss, Fort Ann. Consists essentially of quartz,’ garnet, 
biotite, orthoclase, some plagioclase, and zircons. 
B and C were collected by J. F. Kemp, who supplies the petrographic data. Analy- 
ses by W. F. Hillebrand, record No. 1930. 
A B. Cc 
DIOR sate hesiasisenind are Base aedae emia pes TES ERR BER Rae RAG SORE eR ee EEE 36.80 | 64.47 65. 09 
INGO i ssacc cree aisic re saniecicemamon eetmmcaa nad ee sRneeeEENciane Sean 4.16 | 10.51 16.37 
NOG oi stai ass aconrsosesase nus a mustevstermsafovoietetorwianeissa Suieist Nese GiastanTaectaaTe eas hen trem emmem RSet ametal lea mereae 1.11 93 
FeO. 8. 33 7.37 5. 64 
MgO 25. 98 5.21 2. 40 
CaO. 8.63 3.10 2. 40 
Na2O 17 2.21 3.31 
Ee act cet ee da Mesum Bete a mapas A ai dere EI ae a ete n ge eeth cetceae eer 2. 48 3. 63 1.93 
PONS E MOS! nc cia ot ome ceca uiomes tapi atetnee nds “ 51 «18 13 
H2O above 105° 5 6. 93 hoi 58 
HO 2.0, ejeizrisizae 1. 26 65 93 
LIED yf Sakata NS SES cp Nadya ta nee age Cay wat oka ns Sp APRS Fenn She oc cs a ete geaanSy esse gerne Ree saeat case Des taaeeiae none ol 
CO2. 2.95 - 58 07 
PaO Sagas ered ovate acess Mean cheered mete bin Dad Reaoneeeniedrranns gases 47 25 11 
Sadan OR ee eV Vag Seco SSVI Se ERE SRS -95 12 03 
S03. BOB serctesveg 20) srereeecaiarers 
CreO3 -20 | trace? trace 
NiO. 09 04 trace 
MnO 13 «15 16 
BOO acis ste amiaveinnsinace cusentecemtavnsuisen <pacesameticinnent eerie 12 04 03 
BLO ioc sigs starsorares are ertecinie mercincestiorate tharos ace coma haner pnb ena ete wie avonevarane eran ene trace | trace trace 
DNGO wise ecin chaos a5 yee ewaacasomm easy Ieee pager ype eg eee se eae eer aS Sawer none trace 
100. 22 | 100.37 | 100.12 
OSS ccvsetogscetencsste aceite te min eee, Sele th oes ee me 47 506 frnnceecs 
99.75 | 100.31 ]........ 
NEW JERSEY. 
Rocks A, B, and © described by J. P. Iddings in Bull. 150, pp. 254, 209, 236. 
Analyses by Eakins, record No. 1299. 
A. Basalt, Watchung Mountain, Orange. Auvergnose. Contains pyroxene, 
mostly malacolite, plagioclase, magnetite, and glass, with variable amounts of ser- 
pentine or chlorite. The feldspar is partly altered into a mineral which is probably 
prehnite. P. R. C. 102. 
B. Elexolite syenite, Beemersville. Beemerose. Contains nephelite, orthoclase, 
zgirite, and biotite, with melanite, sphene, apatite, zircon, and magnetite in smaller 
amounts. Sodalite is probably present also. P. R. C. 78. 
C. Minette, Franklin Furnace. Contains alkali feldspar, biotite, monoclinic 
pyroxene, magnetite, epidote, calcite, chlorite, apatite, sphene, pyrite, and a little 
secondary quartz. P.R.C. 91. 
D. Nepheline syenite, Brookville. Viezzenose. Collected by N. H. Darton and 
described by F. L. Ransome in Am. Jour. Sci., 4th ser., vol. 8, p. 417. Contains alkali 
feldspars, nepheline largely altered to secondary minerals, brown amphibole, biotite, 
cancrinite, plagioclase, muscovite, segirine-augite, apatite, titanite, fluorite, and afew 
specks of magnetite. Also secondary analcite, sericite, and natrolite (?). Analysis 
by Steiger, record No. 1807. P. R. OC. 223. 
