JOURNAL OF GEoLocy, VoL. XXIX, No. 3 PLATE V 
* B 
A. Microcline microperthite (hypoperthite), called “Oligo- 
b) 
clase,” Eganville, Ontario, Canada. Polarized light. x 30. 
Specimen 962. 
B. Anorthoclase, Frederiksvarn, Norway. Polarized light. 
X30. Specimen o8t. 
