7.40 Sundials

8.5 Biology of Polluted Water

8.30 Contrasts in Musical Language

8.55 Students and Revolution

9.20 Mechanics - Volume Integrals

9.45 Complex Human Ecosystems (2)

10.10 Human Factors in Aviation

10.35 Computer Hardware

11.0 Microfossils

11.25 The Coal Face

11.50 Maths Analysis - Differentiation

12.15 The Way of the World

1.5 The Bauhaus at Weimar

continuing the season of feature films starring
Jeanette MacDonald , Nelson Eddy Jeanette MacDonald and Nelson Eddy , one of the most popular and enduring partnerships in pictures, set sail for romance and adventure in the Caribbean with a cargo of songs from the Sigmund Romberg musical about a marriage of convenience that turns out to be a love match.
Screenplay by JACQUES DEVAL and ROBERT ARTHUR based on the operetta by OSCAR HAMMERSTEIN . FRANK MANDEL and LAURENCE SCHWAB
Music by SIGMUND ROMBERG Produced and directed by ROBERT Z. LEONARD
. Films: page 29

The programme in which the BBC hands over air time to the public. Tonight:
The Easterhouse Festival Society
Easterhouse is a post-war housing development on the eastern edge of Glasgow. An estimated 60,000 people live there, but there are no cinemas, no theatres, no restaurants - not even a bingo hall.
The second five-month-long Easterhouse Summer Festival starts this month, and in tonight's programme local people show how their efforts are helping to change the image of this much-maligned community.
Made with the help of the Community Programme Unit

The Embassy World Professional Snooker Championship
The 47-frame final finishes this evening as the players oegin the last nine frames that will decide the championship. DAVID VINE introduces live coverage as the final session begins. Commentator TED LOWE

Expert cooking, gardening and do-it-yourself advice plus viewers' tips from ZENA SKINNER , GEOFFREY SMITH , ROY DAY and VAL HUDSON.
Director PAULA GILDER Producer BRIAN DAVIES

Where it happens and why it's happening, with the correspondents of the BBC in Britain and round the world.
Film editing BOB scholes Editor GEORGE WALKER

Weather

The Schweppes WRU Challenge Cup Final
Bridgend v Pontypridd
J. P. R. Williams leads Bridgend in their centenary year in this their first appearance in the Cup Final. This will also be Pontypridd's first final and Tom David will wish to add the cup to the unofficial championship success his club enjoyed last year.
Commentator at Cardiff Arms Park
NIGEL STARMER-SMITH
Director dewi GRIFFITHS
Series producer BILL TAYLOR

As part of Opera Month, BBC2 joins Radio 3 for a simultaneous stereo broadcast of Modest Mussorgsky's great historical opera which was completed and orchestrated by RIMSKY-KORSAKOV. starring Evgeny Nesterenko as Dosifey
With MEMBERS OF THE
BOLSHOI CORPS DE BALLET ballet master s. G. KOREN
THE BOLSHOI CHORUS chorus-masters
A. V. RYBNOV, I. G. AGAFONNIKOV THE BOLSHOI ORCHESTRA conducted by Yuri Simonov
Introduced by HUMPHREY BURTON
Artistic director F. F. FEDOROVSKIY Director and producer L. V. BARATOV
Recorded in Moscow's Bolshot Theatre. Sung In Russian with English sub-titles Made available by SOVIET TELEVISION For cast list see Radio 3 page 36
For the best effect, viewers with stereo Radio 3 should turn off TV sound and position their speakers on either side of the screen, but a few feet away. Stereo headphones provide a suitable alternative

(Also on BBC1)

Part 2

Weather

The Embassy World Professional Snooker Championship
DAVID VINE introduces highlights of the last day's play from the Crucible Theatre, Sheffield.
The most important snooker championship in the world finishes this evening after 13 days of tough match play.
The winner of this championship will receive £10,000 for his pains, together with a trophy, and a title that will be his passport to a very profitable year ahead.
Commentators TED lowe
JACK KARNEHM
CLIVE EVERTON
Producers NICK HUNTER, RICHARD TILLING KEITH PHILLIPS
(A look back at this whole tournament tomorrow at 8.20 pm)

continues the season of films from the writings of Raymond Chandler
Starring George Montgomery, Nancy Guild

Philip Marlowe is called upon to investigate the theft of a rare and valuable coin - a 'Brasher Doubloon'. But this seemingly routine case follows a characteristically complicated pattern as Marlowe becomes involved with a blackmailer who has a photograph of a murder in the Murdock family.

Films: page 29