New Valves for New Needs by J. S. McPetrie , D.SC., M.I.E.E.
Head of the Radio Department, Royal Aircraft Establishment, Farnborough
One of our greatest war-winning weapons was radar, which was made possible by the development of entirely new types of valves working on very short or micro-waves. These micro-waves have many of the characteristics of light waves: they can be beamed in definite directions, and require only small aerials. Such characteristics make micro-waves
'increasingly important for navigational aids, and for telephone, radio, and television links. They have also led to world-wide efforts to invent new and more efficient micro-wave valves.
This week the Institution of Electrical
Engineers is holding an international symposium, and Dr. McPetrie discusses some of the new ideas that have emerged.
Roy Hay introduces comments on The Chelsea Flower Show from THE ViCOMTE DE NOAILLES, a member of the Council of the French National Horticultural Society who recorded his views earlier in the week, ELIZABETH COWELL , an amateur whose garden at Dawyck in Peeblesshire is well known in Scotland, and FRED STREETER , in charge of the gardens at Petworth House in Sussex
Arranged and introduced by Bill Hartley
OUT OF DOORS: John Pheysey talks to those who will this weekend be taking to the open road, with some suggestions by Selwyn Sharp for the picnic YOUR LIFE IN YOUR HANDS: How to behave on the roads this busy weekend BUYING A USED CAR: 2-Mechanical Checks, by Douglas Clease
TIPS ON THE CARE OF YOUR car : Oil bath air cleaners
The week's motoring news and other items of topical interest
Edited by H. Saunders-Jacobs
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