Front:
M-5-Entrance to an Anthracite Coal Mine
N2SLOPE
2A887-N
Back:
LYNN H. BOYER, JR.
PHILADELPHIA, PA
AND WILDWOOD, N. J.
descending by an inclined slope into the mine.
These miners are shown aboard a gun boat,
"C. T. AMERICAN ART," REG. U. 5. PAT. OFF
