* 53/05/12    1 Present Perplexities
* 53/05/19    2 Obsolete Ideas
* 53/05/26    3 The Modern Mastery of Nature
* 53/06/02    4 The Limits of Human Power
* 53/06/09    5 Conflict and Unification
* 53/06/16    6 Achievement of Harmony
* 53/06/23    7 Reflections on Being 80