The visible numerator
By: Oliver A. Shaw, patentee
Series: Goldsmiths'-Kress library of economic literature -- no. 26699.26-1; Making of the Modern World
Publisher: [s.n.]
Published: 1831
Place of publication: Virginia?
Language: eng
Subjects: Arithmetic; Study and teaching
Notes: An advertisement for an apparatus designed to teach the "general principles of arithmetic."

Goldsmiths'-Kress no. 26699.26-1.