in May by J. G. Porter , Ph.D., F.R.A.S.
This month Dr. Porter talks about some of the interesting objects in Cepheus and Cassiopeia-among them the Cepheid variable stars, which astronomers use as 'standard candles' for measuring the distances between galaxies.

Lesson 30
Monday's recorded broadcast
A Listen and Learn series

Introduced by Roy Hay
For Your Bookshelf: John Sambrook reviews some of the newly published gardening books
Safe and Efficient Chemicals: Arthur Billitt, head of Lenton Experimental Station, talks about scientific aids in the garden

Introduced by Bill Hartley
Safety is Their Business. 4: The Local Road Safety Organiser
Motor Sport 1961: a preview by Nevil Lloyd
The Lawyer: Should traffic patrols be disguised?
Car Parking Developments: Pat Gregory on the Woolwich Scheme
Produced by David Glencross
Repeated Saturday at 12.0 (Home)

See facing page