342 JE SEE OV OGLE 
In the final, very complicated eutectic, chiefly consisting of feld- 
spars and quartz, there usually seem to appear o.5 per cent Fe.O,, 
©.25 per cent FeO, and o.1-0.25 per cent MgO; thesaeunes: 
TABLE VI 
Basic Concretions Basic Orbs 
Percentage of 
23b 2401 25): 25b2 26b 276 285 20): 202 
SIO Mere essere 53.80] 54.73] 560.01] 56.53] 64.30155.72 | 65.57) 61.10} 68.02 
AMOS seen Me eee Ou'77|| (its To} a“) eR OSS V5.6 0.06 OS Til ecu 
A Ose eine Ce IQ.20| 14.02] 15.19] 16.47] 15.909/21.35 | 17.46] 15.55] 15-31 
Hes Ose ee bas kc te 7 60|. 2434 DVM Atl APSA So oe « 4.1s|L 2-20 0.59 
EO sees 4.92] 4.89] 5.40] 5.98] 8.81 1 22a) arenes 
Wir). ene Fe meni | eis eee [fee ee o.40| 0.20] tr. OMIM Iho llaob oS olloddc co - 
IMO) lat eaka-csero ote AKO GoAC| AO7) 2.07] 2.67) ©.0% 2053) OngolmeseAn 
CaO eran 557} UO.2O)| ABS A.@el] B57) R10 240 | ae eee 
INAS Oe a rome nines 2.16] 2.98] 5.66] 5.50} 4.06] 5.71 eal Aa) 2 ths 
IRAQ Eee eevee Jn Foes] DaO7|| Asad) Becskoll AAO 1 93 || “asl @.38]| S-67 
IPO a eonon cena. 1.20] tr O53) O27 “tre! | 2. Be] | ee 
Tice US Ree ae eed: Te? S| 2 3|| 2 0 ORO? ||NNOHOS|NOn4O 1.26] 1.80] 0.46 
Mota eee IOT.59|100.99] 99.21) 99.98]100.44/99.94 | 99.83|100.58] 99.98 
Intervening Mass 
23¢ 246 25 Cx 2502 26¢ 276 28¢ 20C 
SM"Orscccscsoccas 74.40| 70.44] 71.90] 73.60] 73.70] 70.05 |68.27] 71.7I]...... 
ABIL @ Fresco neon eral Ieeoreeeresel|senret too ©.35] ©.23)) we. OBE MMe loecc sollac sca c 
TN O etal cone aren epete 13.91| 15.63] 14.12] 12.46] 14.44] 14.78 |15.50] 15.05]...... 
Hel O easyer Nt : TAA TA) WAT Oa.ABloooss< ‘i rea eee 
HORS aes f “39 x 1a) ©.85| woG/s| BLO] 3.37 3} 0.20 BE sc 
IY Bol OGD rea cmnariee Peet cael lest ara ©.©§] O.i15)) we O22 ||. ascent See 
Mig @ ya anne P23 | OMS 5 ONS S| ME OMEL/7]|eNt ©: 44) ||) a0] Ons 0] peer 
CaOh etl estes ees OQoOn|) LOS} eons! CoAO) aocks)| B71 || WOB) #-ABacooc- 
Na,O He eM t ate ALO ACR Asgall AeA) Mall Bone |) B@n\| 4. 30)\occ55- 
AO eoetne tte Seo. 5 AGRO! Sows) | Anni) Ao) ALA) aot |) 5-87) SHAG .200¢ 
1D © Feige oe eer meal meet ei om til eer o VECO gee MMA Iyer IBA Blalhe'o.6 dia allo ov  0.¢ 
hemac.b elke uate HOS) O55] O09) C.gs)| O.0n] Oa || 1.55) @.O7||,...-. 
Mota eae vac LOO. 25/100 .82|100.35|100.00/100.30|100.12 |9Q.25] 99.77|.-.-.-- 
EXPLANATION 
No. 23: See Rosenbusch, Elemente der Gesteinslehre, 1901; from Pelvoux.— 
No. 24: Graber, Jahrb. d. k.-k. geol. Reichsanstalt, Wien, 1897; from Topla 
in Carinthia.—No. 25: Clarke, U.S. Geol. Survey Bull. 168, 24; from Mount 
Ascutney, Vt.—No. 256, and ¢2, granite porphyry.—No. 26: J. A. Phillips, 
Quart. Jour. London, 1880; from Peterhead, Scotland.—No. 27: H. Backstrém, 
Geol. Foren. Férh., Stockholm, 1894; from Kortfors, Sweden.—Nos. 28-29: 
K. yv. Chrustschoff, ‘Uber holokrystalline makrovariolithische Gesteine,” 
Mém. de Vacadémie des sc. de St. Pétersbourg, 1894. No. 28 from Altai; No. 
29 from Fonni, Sardinia. 
