ZZ ANALYSES OF ROCKS AND MINERALS, LOdU—LUUd. 
G. Biotite granite, Moore’s quarry, Florence. Lassenose. Very feldspathic. 
Quartz rare, with fluid inclusions. Feldspar mostly triclinic, orthoclase and micro- 
cline present in small quantities. Little muscovite, some rutile. Analysis by 
Eakins, record No. 1414. P. R. C. 1642. 
Rocks E, F, and G are described by Emerson in Mon. XXIX. 
H. Holyokeite, east foot of Mount Tom, Northampton. Probably tuolumnose. 
Described by Emerson in Jour. Geology, vol. 10, p. 508. Contains albite, 70 per 
cent; orthoclase, 9.4 per cent; calcite, 16.4 per cent, with minor amounts of ilmenite, 
dolomite, chalcopyrite, pyrite, and apatite. Analysis by W. F. Hillebrand, record 
No. 1924. P. R. C. 1648. 
Ke 
H20 at 105°. . 
: 15 
\ 1.47 i 1.53 } 68 ae 
109s scien 1.97 91 10 86 
me 5 siadinlonacaciaie sis Ma Te cist een cree Ba Pemeere cre ee Dare eepcuece ee Ree cH paRE [sia ee Simtel snmpeimssiaimtel siticineeintese 7. a 
ON ss a aitatn era eik 5 aac cM OEE RASS S s AERA IES DA TEARS He eel eel ele ee Rene he ee mceie ara 
P9O fin. cccommnnnisinnayasanennsewincisiciag sansa ceate saa eecenbeRecres asEeees 09 -17 | trace ll 
Scale ieee VE ts raethewd Spores vee Shas eA aa NRK Asesinas nee le bactees ie Sait wed| eine evan [be eatareee call etacvarra al7 
MnO trace 11 | trace] undet. 
BOO s sacevenaniny. saentar doneprer er tyrieenaiateaceilea potas trace 2 facrasieion 
Ol sssue-wecsusssk peeseeeaaiee sete ere eR Geek tee etnemiteeomicisise eect letecie ner letecismers | aieemettand 14 
Analyses I to P are of rocks collected by B. K. Emerson, and as yet, with two 
exceptions, undescribed. 
I. Gneissoid granite, north well of Flint’s quarry, Monson. Amadorose. Analysis 
by W. F. Hillebrand, record No. 1924. P. R. C. 1645. 
J. Gneissoid granite, Frawley’s quarry, Erving. Tehamose-toscanose. Analysis 
by George Steiger, record No. 1941. P. R. C. 1648. 
K. Gneissoid granite, Alderman’s quarry, Becket. Toscanose-lassenose. Analysis 
by Steiger, No. 1944. P. R. C. 1649. 
L. Gneissoid biotite granite, Wood’s quarry, Pelham. Toscanose., Analysis by 
Steiger, No. 1960. P. R. C. 1650. 
I J K. L 
EO a cccya seiner oe rapier ere ide OS eReeRice bie bcaaeaeEE Edis anes 65.02 | 74.15 | 70.62 72. 45 
AlOs 18.37 | 13.35] 15.31 13.32 
Fe203 1.21 1.26 1.06 1.93 
FeO. 2.06 -53 -43|°  .63 
MgO 1.49 - 23 29 44 
CaO 6. 20 1.92 1.30 1.81 
INA2 Oe cmaamirrenigisuyenguit da ae oieemuntn cet eenmeatealad aainoneinrainaaaTane 3. 96 2. 84 4, 55 3.55 
KO weenie moar rameter eid aarti ig th ape tE see eatin enceatrtemE a . 64 4.58 4.01 3. 86 
FASO sat 105° ee cverecemaee ohana sera wire ieee arith ieiee wr mevalet-ci se recse -09 -13 16 -59 
H2O above 105°... 
M. Aplite (alsbachite), Fallon Hill, Enfield. Kallerudose. Garnetiferous biotite 
granite dike. P. R. C. 1651. 
N, Another sample, same locality as M. Lassenose-alsbachose. P. R. C. 1652. 
