The Union emery wheel
Subtitle: solid stone centre : manufactured by the Union Stone Company
Contributors: W. C. Nunn (Firm)
Publisher: Union Stone
Published: 1872
Place of publication: Boston
Language: eng
Number of pages: 32
Other titles: Trade catalogues (NLC), Industrial equipment and supplies; Catalogues commerciaux (BNC), équipement et articles industriels
Notes: A corporate body and subject index for this collection, and other trade catalogues, is located in the National Archives Reading Room.

Agent: W.C. Nunn, Belleville, Ontario.

"Circular no. 90"--Cover.