Presented by Geoffrey Matthews.
For Schools
(Repeated on Friday at 9.40 a.m.)
(These broadcasts are at 10.2 a.m. on Mondays and at 10.2 a.m. on Wednesdays)
To accompany this series a specially prepared booklet containing examples and explanatory notes can be obtained by sending a crossed postal order for 1s. to BBC Publications [address removed]
(to 10.22)