No Copyright - United States
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Notes:
Title supplied by cataloger.
Print in album volume MDWSC, Contract 14, Wachusett-Coldbrook Tunnel, Tunnel East and Shaft 1, Volume 1, Chief Engineer set
Typed on back: Shaft 2 east. The light material is pegmatite, the dark is partially granitized schist. The light spot across the dark band on the left is caused by light striking a joint surface and not by a change in the rock.
Notes (acquisition):
Massachusetts Metropolitan District Commission; Massachusetts Department of Conservation and Recreation