A brief description of the nature and construction of the visible numerator
Subtitle: with directions for its use
By: by the patentee
Publisher: Printed by Sleight & Robinson
Published: 1831
Place of publication: New York
Language: eng
Number of pages: 16
Subjects: Arithmetic; Early works to 1900; Study and teaching
Other titles: Visible numerator.
Notes: Signed (p. [2]): Oliver A. Shaw, patentee. Richmond (Va.)