FA53
Frame ID: FA 53
Sample ID: 91981(slide 320-15)
Magnification: 330 microns on long side
Illuminator: Vertical
Objective: 32x oil
Polarizer: Out
Analyzer: Out
Retarder Plate: Out
Filter:
Important Features: glass
Large solid glass spheres, probably containing included sub-micron crystals. From a power plant burning high-sulfur, high volatile bituminous Western Kentucky coal.