IGNEOUS AND CRYSTALLINE ROCKS. 19 
res o Hine Sacsaeh a badiqusuce tawaeeteids Se eege mecca aencsadedsean done 40.77 | 38. o 64, " 87, 82 
RGA Oy niga ete csenisenaeeoeccrats Sa usbheopeesseeaee oceec laces x60) x44] ial] 7.92 
ae 1.47 .99 | 3.90 116 
: a0 i 39.37 | 40.61 | 34.40] 47.94 
fe a nore -40 hone none 
0 eno ip esa ee aoe ee mR COE 10| ‘on f -08|f trace 
EGO at Ge oo So carinm cate nauin SAtsa bemoan cera smadue eae heee 49 +36 -70 05 
HO ahove 110° --| 12.48] 10.91] 3.07] 12.50 
iO. . .-| Tone} none | none trace 
P30,- - trace | trace | none trace 
CraOs 28 -39 14 19 
MNO esas ce cy ccen octcgcomeges eeiedueeete uae -09 .10 hl Paneer 
me si diniava hy epecraldiace J ets ea acelesleme eras SHER EOEIEG BN Mie dteteicinninie soc 17 21 23 45 
POO abn d eaecanesy ve tereawie MOTI aa cieGiy Vebadiai wnineas ooeutediempremeensionl -iseweet| seabed labeedads 05 
DieO scien swe acdainy incense eats siuGines 2 aaouatalmes o2aGlide hese eawerel tTACe:)) AACS: enccanlesncea qe 
H. Rich, dark-green serpentine, Rowe. P. R. ('. 1623. 
I. Black serpentine, containing marmolite, Atwater’s quarry, Russell. P. R. C. 
1624. 
J. Blackish-green serpentine, containing much chromite. From ‘‘The Crater,” 
North Blandford. P. R. C. 1625. 
K. Gray, splintery serpentine, Chester. P. R. ('. 1626. 
Analyses by Steiger, record No. 1536. 
1.86]  .50| 1.18 77 
2:75| 604] 446; 2.81 
4 1.94] 3.14] 4.25 
K20...... 
H20 at 100°. . 21 71 34 38 
H20 above 100 10.51 | 12.07 9. 48 7.00 
TiO 9-.nc ccc skeen at ve admeuesieeetinca cans woes mennenis seine cieleeieeeins ate none | trace | none none 
PaO seciicjinic:c wciccugiaa saadce amet este pegs Aeeeeewaunes Keeoseice gesed wae trace | trace 02 trace 
CTO gievacadiscgtee ais asadiderewcis ced sae) es PME EERE 33 33 38 
MnO trace | trace | none 04 
NiO. - 40 47 \ 33 
CoO. trace | none | trace . 
COz.. 1,44 1.85 | none 10. 82 
BO ave cepeeaessicmch x caecieesihinalea tornnatmaciancianaannnteesenetat esekeu trace .20 | none 20 
WeSeucsescsecsencssh see qeasnesenerineicese se eci es micecacoassa arenes B® | cies cerays | eieeertisiereall eehstiaSeere 
2. AMPHIBOLITE. 
Rocks A to G are described by Emerson in Mon. XXIX. 
A. Amphibolite, Bernardston. A black, heavy, massive hornblende rock. Analysis 
by L. G. Eakins, record No. 1327. P. R. C. 1627. 
B. Porphyritic amphibolite, Heath. Analysis by Eakins, record No. 1325. P. R. 
C. 1628. 
C. Amphibolite, New Salem. Analysis by Eakins, record No. 1325. P.R. ©. 1629. 
D. Amphibolite, Whitmans Ferry, Sunderland. Thin, shaly, aphanitic. Analysis 
by Eakins, record No, 1325, P. ©. R. 1630. 
