24 ANALYSES OF ROCKS AND MINERALS, 1880-1908. 
Vv Ww. x 
SIO s.5-emecenieesaieadeorivcadmsedanscadodecuhctateseselnacaeedintenene 60. 44 47.18 75. 05 
ATS Os cetsreidta ceciecrtes ane see a epeistans pau SER tai ad ease 16. 26 16.90 12. 83 
POO Seiscserocsisieisinizicicic’ pwisininre ciermaremceinsavse 2% Seno ee Eee TEER ew! -07 5.21 Lil 
TG © eceseetesinwtsaestoreuceatciavn vincyre sratatecatctalictslah ni sivin safer atavadsnataieaeete tafe eA 3, 52 7.22 53 
Me Ohcecems arse eens sey enleet sate terme elec dctieenteannesaiclnicinesia aeeroresraies 1.75 3.71 31 
CEO)... .aaieseser ns smeriaiiciemt ier ange tewetamiernancecain 7. 86 9. 69 85 
INGO)... cnuisaanna tegancuitnGae atin eee ee eat ies 7.13 2.76 3.02 
Fig Oe ocaens ches ticcisaseaatcded cj husiadinleie sistas Seaseeng EE AEA CRESS 44 - 68 5.14 
TAO at MOB 55.245, Shs Seeln dl cechstanctaninen asics atone ee ela ee EEO .29 -92 72 
THO ahove WO5? sca caiewnlolascgnicuseesede Be fens ee ite ees 38 1.66 62 
DO) scape rccnerssiard ene Sree Gracey ica ee iid DERG Daneman 1.33 2.94 20 
DLO guiciciascisszira ian ea sais Semmes steed ES Meee Lewes eee: - 06 trace 02 
C8. sonsects a ois eisiaienicnwecmamacatnces Seneca eased eae Dee none - 63 07 
Ps Oiserempee sd gears erwsinicie maton seoreasiticieg icici as einenterddkrsed aintcsrarera tees ama eeceare . 58 - 38 04 
(Cl ieee remerey tare eroneae cade ne de wigmnm nia cine lemartatencuIne eee Ia undet. trace trace 
WB acieces nue: B12 a ea a seeps sng ee wn eee eaeeione latanens: eesicvonicteecjeiens undet. trace? trace? 
chai aarstonyetens eerste none a 01 
MnO . 06 14 03 
NiO....- trace PLACE | s.scssrcrsicre.are 
SrO... trace? trace trace 
TB 8 ste <5 SS eae ac aN ib aide hoe Cage seen ee oesieraesenaialeacic trace? -O1 03 
Wig Ota na eerie acres deea ua nian aeceeekemde cect eines HONE! fin: gts apes trace 
UIT OD es chaise slot ican pv ae Palace Sosa ea el Sect oe msi aft sR Ama aaa ie | A oe OS 2 issiecciencis 
BOS 8 nc ncosssir sere seseeiwntiiat ya Reais or eeeni as dane deen acee eer Oem LO) eccrsssteidrecticieacdiesciaicressees 
100. 27 100. 28 100. 58 
CONNECTICUT. 
A. Olivine basalt, main flow, Pine Hill, South Britain. Awvergnose. Contains 
plagioclase, pink augite, olivine, and magnetite. The rock is quite fresh. P. R. 
C. 1456. 
B. Olivine basalt, anterior flow, South Britain. Contains plagioclase, uralitized 
augite, olivine, and magnetite. Rock much altered, and containing numerous 
amygdules of calcite and prehnite stained by iron. P. R. C. 1457. 
Rocks A and B are described by W. H. Hobbs in 21st Ann. Rept., pt. 3, p. 60. 
Analyses by W. F. Hillebrand, record No. 1842. 
C. Basic pitchstone (tachylyte), from the so-called ‘‘ash bed” northeast of Meriden. 
SR. 1-2 of auvergnase. Described by Emerson in Bull. Geol. Soc. America, vol. 8, 
p.77. Analysis by H. N. Stokes, record No. 1641. P. R. C. 1654. 
2 
H20 at 105° 
@ Calculated as pyrite. 
