Wachusett Reservoir, North Dike, westerly portion, stratification on the south side of cut-off trench, station 55+25; from the north, Clinton, Mass., Sep. 12, 1899
Wachusett Reservoir, North Dike, westerly portion, stratification on the south side of cut-off trench, station 55+25; from the north, Clinton, Mass., Sep. 12, 1899
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Wachusett Reservoir, North Dike, westerly portion, stratification on the south side of cut-off trench, station 55+25; from the north, Clinton, Mass., Sep. 12, 1899