6.40 Optical Microscopy

7.5 The Venetian Twins

A programme for children under 5

4.50 A Year of Change

5.15 Maths: Lebesgue Integrability

5.40 ABC in Kansas City: 4

6.05 Processing the Delinquent

6.30 Transmission Lines

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

including a news summary with sub-titles for the hard-of-hearing, followed by Weather on 2

with Robert Erskine
A series of 13 programmes about 25 centuries of coins - gold, silver and bronze. Greek, Roman or Medieval, all coins reflect their times.
1: Rich as Croesus
In the 7th century BC someone in Greek Asia Minor invented coinage - much more convenient than a sheep or jars of wine.
Directed by JOHN BURROWES
Produced by BETTY WHITE

Spring Special from Clacks Farm with Arthur Billitt and Peter Seabrook
Spring to many people means the glory of fruit trees in blossom. But for the gardener it is a critical time for spraying. Caterpillars, greenfly, bigbud mite and pear midge must be controlled, avoiding the beneficial activities of the bees. Arthur and Peter discuss the fruit-spraying plan for the new fruit plot. Arthur's trial of daffodil varieties should be at their peak, and in the greenhouse Peter looks at the progress of tomatoes, roses and bedding plants.
Produced by BARRIE EDGAR BBC Birmingham

(Also on BBC1)

The BBC2 Opera Month continues with Verdi's great dramatic opera. PIAVE'S text is sung in the original Italian with English sub-titles. starring
The cast
Robin Stapleton conducts the London Philharmonic Orchestra leader DAVID NOLAN
The Ambrosian Opera Chorus chorus-master JOHN MCCARTHY associate conductor DAVID TAYLOR
A glorious Macbeth ... a notable landmark in televised opera. (SUNDAY TIMES) One of the most spectacular productions to come from the BBC's music department. (DAILY EXPRESS)
Choreographer ROBERT NORTH
Designer DAVID MYERSCOUGH-JONES
Produced by BRIAN LARGE Preview: page 23

PETER DORLiNG introduces extracts from some of the day's Election speeches.

The Embassy World Professional Snooker 'Championship
DAVID VINE introduces highlights of the fifth day's play from the Crucible Theatre, Sheffield.
Canadian Champion CLIFF THOR-BURN. losing finalist two years ago, is seeded to win his match today and join the remaining quarter-finalists who begin their matches tonight. Commentators
TED LOWE , JACK KARNEHM and CLIVE EVERTON
Book, Pot Black, 11.25, from bookshops