7.40 Participation in Re-housing

8.5 Atoms and Molecules

8.30 Argument on Television: Programme 2

8.55 What is Truth?

9.20 Functions and Graphs

9.45 A Feel for Space

10.10 Ellingham Diagrams

10.35 Instrumentation: Numerical Control

11.0 Waves

11.25 Deer Farming

11.50 Computing - Noughts and Crosses: 1

12.15 Baroque Solo Concertos

12.40 The Market Town

1.5 Keynes and The War Economy

1.30 Images of the Working Class

The Self-help Show
Presented by Ian Breach and Ann Hunter
A fortnightly look at community action
In South London, groups of kids, pensioners and tenants are learning how to use and enjoy photography both for themselves and for their community-The Black-friars Photographic Project.
A Community Programme Unit production

Tonight from BBC North: Remember You're Ladies
Last summer the girls from the chapel choir Of HARROGATE COLLEGE went to the International Music Eisteddfod in Llangollen.
This film is a behind-the-scenes record of that week - from the rehearsals at school through the tension of competition to the relaxation and fun of a week away from the pressures of school timetables and exams.
Producer NICK BARRATT
Series co-ordinator FRANK GILLARD

Creators of Modern Philosophy
The last of 15 programmes in which Bryan Magee talks to leading philosophers about Western philosophy today.
Philosophy: The Social Context with ERNEST GELLNER , Professor of Philosophy in the Department of Sociology, London School of Economics.
ERNEST GELLNER and BRYAN MAGEE set contemporary philosophy against its social background and show how its central concerns have arisen out of deep-seated historical changes in the Western world. They end with a discussion of probable future developments.
Series prepared by BRYAN MAGEE Director TONY TYLEY
Executive producer JANET HOENIG Book (same title), 17.50, from bookshops

for The Whitbread Trophy
The closing stages of the second day of this famous three-day event, where the world's leading riders are competing in the cross-country phase.
Introduced by RAYMOND BROOKS-WARD
Commentators DORIAN WILLIAMS andMICHAEL TUCKER
Television presentation by FRED VINER and JOHN SHREWSBURY

Expert cooking, gardening and do-it-yourself advice plus viewers' tips from ZENA SKINNER , GEOFFREY SMITH , ROY DAY and VAL HUDSON.
Today's items include how to grow your own tomatoes and a recipe for making your own biscuits.
Director PAULA GILDER Producer BRIAN DAVIES
For a free information sheet coverina this week's items, send a large sae to: [address removed]. The Good Ideas Book, 11.70, from bookshops

Where it happens and why it's happening, with BBC correspondents.
Film editing BOB SCHOLES Editor GEORGE WALKER

Frame of the Day
DAVID viNE introduces an outstanding frame, together with the news and comment from the World
Championship in Sheffield.

Weather

Opera Month continues with an insight into the world of Richard Wagner. Tonight a re-run of two films with strong Wagnerian themes.
Introduced by HUMPHREY BURTON Part 1
Bayreuth: The Impossible Vision
Made in 1976 to mark the Centenary of the Bayreuth Festival.
Written and narrated by John Culshaw this programme takes an unblinkered look at the vicissitudes which faced Wagner and members of his family in running the Festival and includes rare film of Siegfried, Winifred, Wieland and Wolfgang Wagner. Singers appearing include: JEAN COX, JOSEF GREINDL
RUTH HESSE , GWYNETH JONES FRIEDA LEIDER , MAX LORENZ
FRANZ MAZURA , DONALD MCINTYRE MARITA NAPIER , BIRGIT NILSSON
ANNA REYNOLDS , KARL RIDDERBUSCH ANJA SILJA, THOMAS STEWART WOLFGANG WINDGASSEN
ERWIN WOHLFAHRT with the CHORUS and ORCHESTRA
OF THE BAYREUTH FESTIVAL conducted by HERMANN ABENDROTH KARL BOHM , KARL ELMENDORFF THOMAS SCHIPPERS and HORST STEIN
Film cameraman EUGENE CARR
Produced by BRIAN LARGE

Barry Took looks at Play School - the daily programme which open-fed BBC2 15 years ago today.
With Brian Cant and presenters past and present.

Books: The Bold Bad Bus, 70p; Play School: Humpty's Rhymes, 55p; Play School: Ready to Play, £1.50; More Stories from Play School, 40p, from bookshops.
Play School letter: page 83

Part 2
The Golden Ring
Made in 1965, this film goes behind the scenes in Vienna during the sessions for the first stereo gramophone recording of Wagner's Gotterdammerung, described by Alec Robertson as 'the greatest 'achievement in the history of the gramophone'.
(Black and white).

The Embassy World Professional Snooker
'Championship rhe Quarter-finals
DAVID VINE introduces highlights of the sixth day's play from the Crucible Theatre, Sheffield. The results of all four matches are due today in what promises to be one of the most exciting days of the championship. Commentators TED LOWE
JACK KARNEHM , CLIVE EVERTON

Weather

The Big Sleep opens a season of films from the writings of Raymond Chandler, starring Humphrey Bogart, Lauren Bacall

Chandler's greatest creation, the private detective Philip Marlowe, is here portrayed by Bogart in a masterly performance - at once laconic and tough, yet finally melting into the protective arms of Miss Bacall. Marlowe is involved with the ultra-rich Sternwood family, blackmail and drugs and the 'big sleep' - known to most of us as death.
(Black and white)
Films: page 21
(Next Thursday: Farewell, My Lovely)
Feature: p 84