Extraordinary pulley turning
Subtitle: Exposition Building, Cincinnati, Oct. 2, 1872 : we, the undersigned, bear witness to the fact that a pulley thirty (30) inches in diameter and ten (10) inches face, of ordinarily hard metal, was turned ... by the boring and turning machine exhibited in the Exposition by the Niles Tool Works ...
Publisher: Niles Tool Works
Published: 1878
Place of publication: Hamilton, Ohio
Language: eng
Notes: Broadside.

Ill. is mounted photograph.

Latest testimonial dated: Jan. 17th, 1878.