Three talks by 0. R. Frisch , F.R.S. Jacksonian Professor of Natural Philosophy
In the University of Cambridge 3-Strangeness and Parity
For a long time it has been known that energy and electric charge are conserved — In other words, they can neither be created nor destroyed.
. Recent research with fundamental par-rides has revealed more such quantities, and also the fact that two of them-those designated as ' strangeness ' and ' parity — are only conserved for very brief periods of time. Philosophically the non-conservation of parity is of great significance because, since it was discovered three years ago, it has fundamentally altered views on the symmetry of the universe as a whole.

An illustrated study in the origins of Wagner's opera by Hanns Himmelmann and Michael Ross.
Followed by an interlude at 7.50

See foot of page and page 3
Part 1

by the Legal Correspondent of The Observer
The International Court at The Hague has never before had to consider a national right-of-way.

Part 2

'architect of the clear and reasonable'
Interviewed by Graeme Shankland, architect and planner in the Architect's Department of the L.C.C. In May last year Mies van der Rohe, who lives and works in the U.S.A., came to London to receive the R.I.B.A.'s Gold Medal, the highest architectural honour this country can bestow. The interview was recorded during his visit.

Milos Sadlo (cello)
Ernest Lush (piano)