6.40 Geochemicat Mapping. 7.5 England ! is thePiaceforMe.7.M Porphyry CopperDeposits.

Story: Dots and Gaps by JOANNA COLE
Presenters
Elizabeth Millbank , Don Spencer

The Embassy World Professional Snooker Championship from the Crucible Theatre, Sheffield.
The semi-finals continue throughout the day as the final four fight it out. Introduced by David Vine

A study of the work of the architects who built the ' Siedlung ' (Exhibition Estate) at Weissenhof, near Stuttgart in Germany. The white-stuccoed. Hat-roofed buildings were designed by men who were later to become famous, such as Gropius, Mies van der Rohe and Le Corbusier. How far does the architecture match up to the architects' ideal of making ' new ways to live'?
A BBC/Open University production

The final episode of the classic serial starring
War of the Ptanets
(Black and white. Repeat)

Presented by Charlotte Allen

A narrow ledge, a chasm with a raging torrent below, no bridge - how to get across? That's the problem confronting teams from The Princess Margaret Rose Orthopaedic Hospital, GEC and Jaymic.
Heinz Wolff and Gordon Higginson, Professor of Engineering, Durham University, are the judges.

Seven programmes
6: Dave Taylor Goes to School
If you're too young to ride on the road legally, how do you find out what motorcycling is really like? DAVE TAYLOR does 'wheelies' in school playgrounds all over the country but follows it with a hard-hitting lecture to school audiences about the good and the bad sides of motorcycling.
Technical manager DEREK FAWLEY Directed by MIKE COCKER Producer IAN wooLF
Book (same titte), £1.50 from booksellers.

Ffame o/ the Day
Both semi-Hnals have con. tinued through the day. DAVID viNE introduces a vita! frame from each.

with subtitles, followed by Weather

Films of early exploration introduced from the Royal Geographical Society by Duncan Carse Pearls and Savages (1921)
This film (some of the first ever to be shot in the South Seas) is the story of an early expedition to ' the vast mystery island of Papua, inhabited by savages, largely untrodden by white men'. The commentary demonstrates well the flavour of the period. The expedition filmed pearl divers in action and the arrival of the first sea-planes ever to be seen in Papua. They witnessed spectacular dance ceremonies, grotesquely-masked witch doctors and finally, pressing ever deeper into ' the lawless realms of cannibalism', they discovered a real bonanza'.
Stuffed heads. Not just skulls - which were plentiful-but human heads!
Narrator BRUCE BARRY
Film editor KEN BERRY Assistant producer DAWN A. SWERLING
Producer RICHARD ROBINSON

(Shown on Monday at 9.25 pnt)

A duel of words and wit between Arthur Marshall
Victoria Wood , Tim Brooke-Taylor and Frank Mulr
Kate O'Mara , Godfrey Smith Referee Robert Robinson
Call My Bluff devised by MARK GOODSON. BILL TODMAN Directed by JOHN BISHOP Producer PAUL CIANI

Breaking the Silence
Rachel was sexually abused by her father from the age of 3 to 16. Neither her teachers nor family welfare workers would or could offer help. ' I don't think they wanted to know, to be honest with you - it was as though it didn't really exist.'
At least 1,500 cases like Rachel's are reported every year. Many more are simply ignored, because the questions raised are considered too uncomfortable. A recent report by child care experts says- 'In our view, awareness of the extent of child sexual abuse is as limited as was awareness of physical child abuse in the late 60s'.
David Henshaw reports on the ways in which both victims and professionals deal with the problem, and looks at radical new schemes, both here and in Holland, to help the children who suffer in silence.
Producer CLAIRE WALMSLEY Editor COLIN ADAMS
HELP! page 75

The Embassy World Professional Snooker Championship from the Crucible Theatre, Sheffield.
DAVID VINE introduces highlights from this evening's semi-final.

Further coverage from the World Championship at Sheffield.