M38

Frame ID: M38
Sample ID: Metallurgical Coke
Magnification: As given
Illuminator: Vertical
Objective: 50x oil
Polarizer: In
Analyzer: In
Retarder Plate: In
Filter: None
Important Features: Roof carbon
High Resolution Image (300 dpi)

Description: The concentric nature and spoke-like extinction pattern are characteristic of carbon deposited on the coke oven roof - roof carbon.