Introduction

11-14

The origination of the concept of multiplicity through that of the collective combination

15-22

Critical developments

23-65

The psychological nature of the collective combination

67-79

Analysis of the concept of number in terms of its origin and content

81-93

The relations "more" and "less"

95-100

The definition of number-equality through the concept of reciprocal one-to-one correlation

101-115

Definitions of number in terms of equivalence

117-132

Discussions concerning unity and multiplicity

133-167

The sense of the statement of number

169-177

Operations on numbers and the authentic number concepts

191-203

Symbolic representations of multiplicities

205-234

The symbolic representations of numbers

235-269

The logical sources of arithmetic

271-301

Original version of the text through chapter iv

305-357

Essays

Wilhelm Wundt

359-503