Science and Hypothesis
Science and Hypothesis by Poincare
Chapter 1
The Nature Of Mathematical Reasoning →

Chapter 1b
Geometry →

Chapter 1c
Proof By Recurrence →

Chapter 1d
Proof By Recurrence →

Chapter 2
Continuum →

Chapter 2b
The Creation of the Mathematical Continuum →

Chapter 2c
Mathematical Magnitude And Experiment →

Chapter 2d
The Physical Continuum of Several Dimensions →

Chapter 3
Non-euclidean Geometries →

Chapter 3b
Interpretation of Non-Euclidean Geometries →

Chapter 3c
The Fourth Geometry →

Chapter 4
Space And Geometry →