peal 
at Ty 
wt ik 
0 
Figs.1and2 from near Lester Rirer, Minnesota: Peg-r ordinary lighE, Fy 2 polartzee leght. 
Scales, Fry.1, 20 deameters, Fry.2; I7 Qiameters. 
Lebradoritelz/, orthoclase (2); brinnedt agrte(3/; deallagely/; trtanferous magnetitels; ferrugt- 
nous alteration product of augite(é/; Secondary guartz nelnorh ly, salurating Che Sed spars. 
Fe9.3, from Laclu Bette, Keneenan Point Ordinary light. Fig 4. from Brunschwecler Rtrer, 7tr's. Potarzzcad leght ~ 
Saale,°20 diameters. Seale 25 diameters. 
| Ogoclasel7/; orthoclasel2/, diallage(3), much Gtterea to Labradorite(s), orthoclasei2/; trvlanzferous meagnetitelZz, 
| uradrée (vs, Czla neferous magnetrle (Sh; Grey Substance les auge te (4, Secondary guartz (sj, apatilelés 
allered from tila nue rous magnetite , a patcte (77, Lipe Galelys 
