The axe crashed into the middle of the old dog’s skull,

CHAPTER IV. THE NEW COSMOLOGY--COPERNICUS TO KEPLER AND GALILEO

CHAPTER V. GALILEO AND THE NEW PHYSICS

CHAPTER VI. TWO PSEUDO-SCIENCES--ALCHEMY AND ASTROLOGY

CHAPTER VII. FROM PARACELSUS TO HARVEY

CHAPTER VIII. MEDICINE IN THE SIXTEENTH AND SEVENTEENTH CENTURIES

CHAPTER IX. PHILOSOPHER-SCIENTISTS AND NEW INSTITUTIONS OF

CHAPTER X. THE SUCCESSORS OF GALILEO IN PHYSICAL SCIENCE

CHAPTER XI. NEWTON AND THE COMPOSITION OF LIGHT