Anthracite Coal Specimen Light & Optics_Color anchoring retort stands and apparatus

anchoring retort stands and apparatus to the edge of a classroom workbench

letting students compare their traces against real seismic-recording patterns

a 75mm-long optical-quality equilateral glass prism with 25mm faces splits white light cleanly for dispersion and refraction work

5L copper steam generator at 9

All-glass vacuum desiccator chamber allows visual monitoring of sample drying progress under reduced pressure

Anthracite Coal Specimen Light & Optics_Color anchoring retort stands and apparatusDemonstrates the metamorphic end stage of coal maturation, with higher carbon content and cleaner burning properties than bituminous or lignite precursors.