Ethics, modern, [50], [250], [325], [330], [347]

Eucken, R., [26], [50], [51], [244], [294] et seq.

Euler, [210]

Evolution, Theory of, [49], [157], [241] et seq.

—— Theory, held by Catholic Scientists, [223]

Faith, [14], [43], [51]

—— and Reason, [73]

—— Authority of, [61], [81]

—— Definition of, [61], [63], [66]

—— Doubts forbidden, [139]