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Details of Transformer Rooms (21-S), 12/19/1923
Pencil-on-vellum drawing, 19-1/2x36 inches
Oversize Tube 9
Mechanical Construction Drawings
Black and red ink-on-linen drawings with pencil and blue pencil revisions, 30-1/4x57-1/2 inches
Plans of Basement and Fan Rooms (2M), revised 6/13/1924
Oversize Tube 9
(undated due to linen damage)