Correspondence between Feynman Lectures in Books and Perseus Audio Tapes
Book	Perseus Volume		Book	Perseus Volume		Book	Perseus Volume
Vol. 1-1*	11		Vol. 1-43	6		Vol. 2-39	3
1-2*	1, 11		1-44	6		2-40	18
1-3*	11		1-45	6		2-41	18
1-4*	5		1-46	12		2-42†	13, 20
1-5 (Sands)	9		1-47	12
1-6 (Sands)	11, 20		1-48	12		Vol. 3-1*	1, 10
1-7*	13, 20		1-49	12		3-2	1, 10, 20
1-8	5		1-50	12		3-3	1
1-9	5		1-51	12		3-4	2
1-10	5		1-52†	2		3-5	1
1-11†	9					3-6	1
1-12	9		Vol. 2-1	14, 20		3-7	10
1-13	5		2-2	14		3-8	10
1-14	5		2-3	14		3-9	19
1-15†	13		2-4	14		3-10	19
1-16†	13		2-5	14		3-11	19
1-17†	9		2-6	14		3-12	2
End of fall 1961 trimester.			2-7	15		3-13‡	4
** Three problem-solving lectures were given in Dec. 1961 but not included in red books or audio tapes.			2-8	15		3-14‡	4
			2-9	15		3-15‡	4
			2-10	3		3-16‡	10
1-18	9		2-11	3		3-17‡	2
1-19	7		2-12	15		3-18‡	19
1-20	7		2-13	15		3-19‡	2
** Special lecture on inertial guidance was given here but not included in red books or audio tapes.			2-14	15		3-20‡	10
			2-15	16		3-21‡	2, 4, 20
			2-16	16
1-21	7		2-17	16		* Also included in Six Easy Pieces
1-22	9		2-18	16
1-23	missing		2-19	19		† Also included in Six Not-So-Easy Pieces
1-24	7		End of fall 1962 trimester.
1-25	7		2-20	16		** Recently published in book form as Feynman's Tips on Physics.
1-26	8		2-21	16
1-27	8		2-22	17
1-28	8		2-23	17		‡ I believe these QM lectures are the ones that were added in the third academic year (Spring 1964) as noted in Matt Sands' preface to Vol. 3.
1-29	8		2-24	17
1-30	8		2-25	17
1-31	8		2-26	17
1-32	13		2-27	17
1-33	19		2-28	missing
1-34	13		2-29	missing
1-35	11		2-30	3
1-36	11		2-31	18
1-37	Same as Vol. 3-1		2-32	3
1-38	Same as Vol. 3-2		2-33	18
1-39	6		2-34	3
1-40	7		2-35	4
1-41	6		2-36	4
1-42	6		2-37	18
			2-38	18
NOTES:
1. Perseus Vol. 20 contains no new tapes. If you collect Vols. 1-19 you will have all the tapes that are currently available.
2. Perseus Vols. 1-19 contain 19 * 6 = 114 tapes with 4 duplications, making 110 lectures.
3. The red books contain 113 lectures. Three book lectures are missing from the audio collection.
4. The Perseus tapes include the dates on which the lectures were originally given, but there appear to be some errors.
For example, Perseus says 3-14 and 3-15 were given on 5/11/63 and 5/14/63 but I think these should be 5/11/64 and 5/14/64.