how they knew. Two days later, his father dragged him into

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

CHAPTER XII. NEWTON AND THE LAW OF GRAVITATION

CHAPTER XIII. INSTRUMENTS OF PRECISION IN THE AGE OF NEWTON