in May and June by J. G. PORTER. Ph.D., F.R.A.S
DR. PORTER talks about the significance of accurate time-keeping in the history of astronomy-and the importance of modem developments.
The northern stars at midnight in May (10 p.m. in mid-June). Can you recognise the Plough when it is upside-down, and almost overhead? Some of the navigational stars are also shown

Monday's broadcast
Details of booklet see page 52

Introduced by Roy HAY
Vegetative Propagation: NOEL PROCKTER explains how to replace winter losses by this method
The Range of Rhododendrons: This year is the two hundredth anniversary of the introduction oi Rhododendron Ponticum and JOHN STREET looks at some of the contrasting types now grown from dwarfs to giants and from greenhouse varieties from Java to hardy species that grow in Lapland

Introduced by BILL HARTLEY
European Automobile Engineering Development: a survey by ROBIN RICHARDS
Do You Buy the Right Sort of Car?: some questions and answers by JACK HAY of The Birmingham Post
R U Hep?: a quizzical look at number plates by STANLEY ROSE In My View ...: road menders, by CLIVE WALKER