Category:A catechism on the combustion of coal and the prevention of smoke; a practical treatise (1900)

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Media in category "A catechism on the combustion of coal and the prevention of smoke; a practical treatise (1900)"

The following 2 files are in this category, out of 2 total.

A catechism on the combustion of coal and the prevention of smoke; a practical treatise (1900) (14596544247).jpg 2,336 × 1,824; 474 KB
A catechism on the combustion of coal and the prevention of smoke; a practical treatise (1900) (14783116955).jpg 1,872 × 1,292; 585 KB

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