16 ANALYSES OF ROCKS AND MINERALS, 1880-1908. 
A B Cc D. E F 
SIO ie syecins Geerssoeae ac eee One Gana aa ase 71.90 | 56.01 | 59.27] 65.43 | 56.51 73.03 
AlgO a ve aineentasencdse 14.12 }@15.19 | 15.76] 16.11] 16.59 13. 43 
BeaO gsiaie s o:csuisrescrs aiavers 1.20 2.34 2.07 1.15 1.35 40 
MOO soicissetaiess asisictcisrasace . 86 4,89 3. 57 2.85 6. 59 1.49 
Mg Oe. issasreteviometiece . 33 4.67 3.04 -40 2. 52 14 
C8 Osco smexeesenean 1.13 4.85 3.69 1.49 4.96 79 
N20 wecewcesmeases 4.52 5.66 5.63 5.00 5.15 4.91 
Ke Os tre wewrenunnaage 4,81 2.16 3. 33 5.97 3.05 4.54 
H20 at 110° 18 - 36 23 19 21 18 
Ha0 above 100°... 42 -90 74 39 71 35 
HO oe sane cesiearcecs 35 1.13 1.12 50 1,20 30 
Pe Ose ca sienecir adatoms u 42 13 41 06 
(540) ene eee 04). coasees 04 aay 04 06 
DO es cee ner taieersrerd 05 40 37 2 24 15 
(NiCo)O........--.- none 03 | trace (?) trace? (?) 
BO) ccicisrsmdesinierctaiviots 04 | trace? | trace? 03 03 | trace? 
COS. wasccscwscecmamesis 21 | undet. .30 | trace? 33,| trace? 
aruvevcis.ciniite Atasbiartetirceieewsse 06 | undet. ~42 0! 24 08 
Clirse erercroran ase iaernyaisc, 02 | undet. . 03 05 07 03 
BOS ae vs cxeeeestecieiantartevtinhe + Paige, ester ie sieisi= trace -09 |, .07 07 06 09 
100.35 | 99.21 | 100.10 } 100.18 | 100.26 | 100.03 
Ti689:O} joints vie nescathawinesisnintlenane Reepatesceeeeemesees|| 0B: lasek. ae 1 0: 
100.32 |......-. 99.91 | 100.14 | 100.15 99.99 
@ Including ZrOz. 
G. Nordmarkite. Phlegrose. Contains orthoclase, plagioclase, microperthite, 
hornblende, quartz, augite, magnetite, biotite, apatite, and zircon. P. R. C. 1348. 
H. Hornblende paisanite. Liparose. Composition like D, but with more quartz. 
P. R. C. 1348. 
I. Basic segregation in H. Akerose. Contains hornblende, green and brown 
augite, biotite, quartz, microperthite, magnetite, little apatite, and zircon. P. R. 
C. 1349. 
J. Diorite. Andose. Contains hornblende, augite, biotite, plagioclase, titaniferous 
magnetite, sphene, zircon, and quartz. P. R. C. 1344. 
K. Windsorite. Toscanose. Contains plagioclase, orthoclase, quartz, biotite, 
magnetite, ilmenite, and very small amounts of diopside, apatite, and zircon. P. 
R. C. 1345. 
