File:Wachusett Dam, pneumatic stone-cutting machine, Boylston, Mass., Nov. 12, 1902, by the Massachusetts Metropolitan Water and Sewerage Board, from the Digital Commonwealth - commonwealth vt150k56p.jpg
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![File:Wachusett Dam, pneumatic stone-cutting machine, Boylston, Mass., Nov. 12, 1902, by the Massachusetts Metropolitan Water and Sewerage Board, from the Digital Commonwealth - commonwealth vt150k56p.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/b/b9/Wachusett_Dam%2C_pneumatic_stone-cutting_machine%2C_Boylston%2C_Mass.%2C_Nov._12%2C_1902%2C_by_the_Massachusetts_Metropolitan_Water_and_Sewerage_Board%2C_from_the_Digital_Commonwealth_-_commonwealth_vt150k56p.jpg/786px-thumbnail.jpg?20220306175659)
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