concept

Phrenological diagrams of the skull and brain, with three portraits: Laurence Sterne, a mathematician, and Shakespeare; exemplifying the faculties of wit, number and imagination respectively. Engraving by H. Sawyer after W. Byam, 1818.

The brain seen from the underside, sectioned horizontally; with attention to the part associated by Hollander's system of phrenology with memory for numbers. Process print, 1901, after etching, 1809.

Rivers running in the wilderness, with serpents and fire between them; representing the stage of 'multiplication' in the alchemical process. Coloured etching after etching, ca. 17th century.

The pregnant Virgin Mary, with a dragon at her feet; representing a stage in the alchemical process. Colour painting after etching, 1772/3.

The number sense : how the mind creates mathematics / Stanislas Dehaene.

The brain seen from the underside, sectioned horizontally; with attention to the parts associated by Hollander's system of phrenology with the faculties of external perception and its memory. Process print, 1901, after etching, 1809.

The child's conception of number / [Translated by C. Gattegno and F.M. Hodgson].

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Number concept

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The number sense : how the mind creates mathematics / Stanislas Dehaene.

The brain seen from the underside, sectioned horizontally; with attention to the parts associated by Hollander's system of phrenology with the faculties of external perception and its memory. Process print, 1901, after etching, 1809.

Rivers running in the wilderness, with serpents and fire between them; representing the stage of 'multiplication' in the alchemical process. Coloured etching after etching, ca. 17th century.

The child's conception of number / [Translated by C. Gattegno and F.M. Hodgson].

The brain seen from the underside, sectioned horizontally; with attention to the part associated by Hollander's system of phrenology with memory for numbers. Process print, 1901, after etching, 1809.