Four talks on a current problem in biology 1: Some Simple Rules by LEWIS WOLPERT
Lecturer in Zoology,
King's College, London
' How does the egg, itself largely without pattern, give rise to the complex shapes of the embryo? *
Molecular biologists are now tackling this question. As Dr. Wolpert shows, to know the biochemistry of the genes-the DNA -is only part of the solution. We must find out more about how cell movements bring about changes in shape, and what forces are involved. Second broadcast
The four talks in this series. originally broadcast weekly in April and May. are being repeated on two evenings this week—No. 2 can be heard at 8.45 tonight and Nos. 3 and 4 on Friday.

Movements from
Messe a I'usage des Paroisses played by MICHEL CHAPUIS organ of Saint Maximin, Provence on a gramophone record

2: The Book of Instructions by ADAM CURTIS
Lecturer in Zoology,
University College, London
' Imagine that biologists are trying to make -living cells and animals. Then the present situation is something like this: we know what parts ought to be provided in the make-yourself-an-animal kit; we even know how to make these parts; but we've very little idea of how to put them together.'
Where is the ' book of instructions'? Dr. Curtis presents some recent evidence which suggests they may not all be ' written ' in the DNA in the cell nucleus. Revised version of the talk broadcast on May 7

by Christine Brooke-Rose
An imaginative treatment of the problem of noise in modern life, and its effect on a man who finds it increasingly hard to endure with Barry Foster Music composed by ROGER SMALLEY in collaboration with the BBC Radiophonic Workshop
Other parts played by Shirley Cooklin , Sheila Grant
Dorit Welles , Norman Claridge George Curzon
James Thomason
Stephen Marriot , John Stirling Produced by NESTA PAIN

Wind Quintet, Op. 26 played by the NEW LONDON WIND ENSEMBLE David Sandeman (flute) Ian Wilson (oboe)
Keith Puddy (clarinet) Timothy Brown (horn) Cecil James (bassoon)

by MARC VIGNAL
The French critic discusses Vaughan Williams 's reputation in France and offers a personal assessment of his stature.

A Charm of Lullabies
HELEN Watts (contralto)
BENJAMIN BRITTEN (piano) Second broadcast