se 




















































Sal 1 
GLASSae Toney 
PERFEMIC 
POM ‘ nN , POM I 
CUR CUAGGHE ea Sk suBcLass 11. -OMe Zs 5 suBCLASS I. POMe S33 SUBCLASS IV. —— eee 
ee ee AC aire o | Ay Ye es é Romar 
PERSILICIC DOSILICIC SILICOMETALLIC DOMETALLIC 
| { = 
FOMG DO stat PORE POL 7 
ORDER 1. 47 >> | ORDER 2. sacar are ORDER Gy Nate repreconted ORDER 1. 37> 
q PERPOLIC | DOPOLIC PERPOLIC PERPOLIC 
. Peed Eee 5 Bras. 3 U2 I pes P P E 2 i; #P P P i Pe eS ee Ege 
Ber oa ea. ca8- se oe 2S | ee ES ee Es SSE 755 5.3 Coe et 553 eee Ls. eee) 2 3 and 4 ee 
Omer Oe 8) Baas AG) i oy BEG “ys Ours orn 4 (a ONE an Sar SOs aan aoe Kos eye POC) aa | O ~1~ 3 |not represented 56 7 
Perpyric Dopyric Pyrolic Domolic Perolic Perpyric Dopyric Pyrolic Perpyric Dopyric Pyrolic Domolic Perolic Perpyric Dopyric Perolic 
a a a a ere ee De rs os oe a Se 
a ., CaO+Mg0O+FeO_ 7 | 
Rang rt. Permirlic, a a | 
Section 1. Permiric, pene 0 Sa | | 
CaO i } | 
; | 
ie OF : i | os | ve SE 
Subrang oaee. Permagnesic, FeO Se Bishopvillose x Hvittisose Orviniose Marjalahtose 
| 
Subrang 2. Domagnesic, mae See Ibbenbiihrenose] Shalkose Travisose Wacondose Kakovose Elwahose Mocsose , Castaliose Pultuskose Farmingtonose | Ornansose Steinbachose | | Minciose 
Subrang 3. Magnesiferrous, Me 2 ee ay Middlesborose | Concordose Kabose Jeromose | Ensisheimose Homesteadose 
| 
| 
Subrang 4. Doferrous, wee — ‘ | 
MgO 1 
Subrang 5. Perferrous, RON | 
| | A rs a —_ 
Section 2. ome ere O 7. 5S. 
CaO ita) 
Pe MeO7 
Subrang 1. Permagnesic, =e pa, Bustose 
NL Oe ise 
Subrang 2. Domagnesic, FeO < : = Z 
F Me OF 15.03. 
Subrang 3. Magnesiferrous, FeO mc : = 5 











