PROBLEM
60. BUT THE WORLD HAD UNDERGONE ANOTHER CHANGE WHICH WAS
OF GREATER IMPORTANCE THAN EITHER THE POLITICAL OR THE
INDUSTRIAL REVOLUTIONS. AFTER GENERATIONS OF OPPRESSION
AND PERSECUTION, THE SCIENTIST HAD AT LAST GAINED
LIBERTY OF ACTION AND HE WAS NOW TRYING TO DISCOVER
THE FUNDAMENTAL LAWS WHICH GOVERN THE UNIVERSE
61. A CHAPTER OF ART
62. THE LAST FIFTY YEARS, INCLUDING SEVERAL EXPLANATIONS
AND A FEW APOLOGIES
63. THE GREAT WAR, WHICH WAS REALLY THE STRUGGLE FOR A
NEW AND BETTER WORLD