'The Off-the-Ration Exhibition' organised by the Ministry of Agriculture at the London Zoo was opened by the Duke of Norfolk on August Bank Holiday. This show, devoted entirely to the interests of domestic producers, will be open for two months, and on Friday, August 7, at 3 p.m., the public are invited to attend a 'Brains Trust' in which several well-known broadcasters will take part, and among them will be Alan Thompson, Alec Hobson, Reginald Gamble, Roy Hay, and I. W. Rhys. The Question-Master will be Donald McCullough to other Brains Trust fame. Listeners will hear a recording of this event in the 'Backs to the Land' period today.