. . "Machinery in the workplace." . . "Massachusetts Charitable Mechanic Association." . . "Massachusetts Charitable Mechanic Association" . "Industrial arts History." . . "Industrial arts." . . . . . . . "Exhibition catalogs"@en . "Exhibition catalogs" . . . . . . . . . "An address delivered before the Massachusetts Charitable Mechanic Association, 20th September, 1837 : on occasion of their first exhibition and fair" . . . "An address delivered before the Massachusetts Charitable Mechanic Association, 20th September, 1837 on occasion of their first exhibition and fair"@en . . . . . . . . . . "History"@en . "History" . "Address ... Sept. 20, 1837" .