THE nineteenth Daily Mail Ideal Honie Exhibition will open at Olympia, London, on March 26. A feature of the Grand Hall will be the great murals, 36 ft. high and 374 ft. long, from end to end of each side of the hall. The eighteen panels will bring to the eye, not only the vivid story of the changing world but also the actual features of more than a thousand men and women-pioneers, social workers, explorers, scientific workers, engineers, industrialists and others who have achieved distinction in helping to change the world for the better. This work has been carried out to the original designs of Oswald Cuningham. Among the features of the Exhibition will be a 50,000 installation of the very latest types of British-made canning machinery, weighing nearly 40 tons, to demonstrate the rapid strides made by this new home industry. Twenty-five years of progress in things engineering and scientific will be found on the second floor of the Empire Hall-the development of electric lighting, telephones, aviation, travel, transport, sound-recording, reproduction and radio. The General Post Office will have in operation the latest of the many wonderful machines utilised in modern communications. The strides made by 'staybrite’ steel, which made its debut at the exhibition last year, will be demonstrated, and there will be numerous exhibits of beauty and utility for the home for furnishing, lighting, heating, decoration, labour-saving and recreation.