The Rudolf Steiner Archive

GA 69a

No.	Lecture Title	Book Title	Date	City
1.	Spiritual Science and the Future of Humanity	Truths and Errors of Spiritual Research	24 Feb 1911	Winterthur
2.	How Does One Disprove Spiritual Science?	Truths and Errors of Spiritual Research	19 Mar 1911	Pforzheim
3.	How Does One Defend Spiritual Science?	Truths and Errors of Spiritual Research	25 Mar 1911	Pforzheim
4.	Truths of Spiritual Research	Truths and Errors of Spiritual Research	25 Nov 1912	Münchenstein
5.	Errors of Spiritual Research I	Truths and Errors of Spiritual Research	27 Nov 1912	Münchenstein
5.	The Errors of Spiritual Investigation	Single translation	27 Nov 1912	Münchenstein
6.	Errors of Spiritual Research II	Truths and Errors of Spiritual Research	19 Feb 1913	Stratford
7.	The Questions of Life and the Riddle of Death I	Truths and Errors of Spiritual Research	16 Feb 1913	Trieste
8.	The Questions of Life and the Riddle of Death II	Truths and Errors of Spiritual Research	17 May 1913	Stratford
9.	Spiritual Science and Natural Sciences — their Relationship to the Riddles of Life I	Truths and Errors of Spiritual Research	1 Mar 1913	Jena
10.	Spiritual Science and Natural Sciences — their Relationship to the Riddles of Life II	Truths and Errors of Spiritual Research	3 Mar 1913	Frankfurt