The Royal Institution’s Library of Science Physical Science  - complete 10 volume set plus index. These are a record of the Friday evening discourses in Physical Sciences held at the Royal Institution from 1851 to 1939.  Hardback edition published by Elsevier in 1970.

There are marks in the margin against a few of the lectures but overall the books are in very good condition.  The index has a dust jacket but none of the other volumes do.