the Dutch style. Aside from the Stadium and major pavilions to house the works of each dominion, colony or group of colonies, there were four other major structures. These were the palaces of Engineering, Industry and Arts, and HM Government Building. All of these palaces can be seen to have had a Roman Imperial character as befitted their political symbolism. At the time, the palaces of Industry and Engineering were world's largest reinforced concrete structures. The exhibition's roads were named by Rudyard Kipling. The site was also served by Britain's, and possibly the world's, first bus station, which could handle 100,000 passengers a day. Opening ceremony The British Empire Exhibition was officially opened by King George V on 23 April 1924—Saint George's Day. The opening ceremony was broadcast by BBC Radio, the first such broadcast by a British monarch. The King also sent a telegram that travelled around the world in one minute 20 seconds before being given back to him by a messenger boy. Exhibits Much of the Empire went on display at Wembley Park, but it had to be, of necessity, reduced to a "taster-sized" version. Of the 58 territories which composed the Empire at the time, 56 participated with displays and pavilions, the exceptions being Gambia and Gibraltar. The Irish Free State did not participate either. The Exhibition's official aim was "to stimulate trade, strengthen bonds that bind mother Country to her Sister States and Daughters, to bring into closer contact the one with each other, to enable all who owe allegiance to the British flag to meet on common ground and learn to know each other". It cost £12 million and was the largest exhibition ever staged anywhere in the world. It attracted 27 million visitors. Admission cost 1s 6d (p) for adults and 9d (p) for children. The Palace of Engineering (in 1925 the Palace of Housing & Transport) was the largest exhibition building. It contained a crane capable of moving 25 tons (a practical necessity, not an exhibit) and contained displays on engineering, shipbuilding, electric power, motor vehicles, railways (including locomotives, see below), metallurgy and telegraphs and wireless. In 1925 there seems to have been less emphasis on things that could also be classified as Industry, with instead more on housing and aircraft. The Palace of Industry was slightly smaller. It contained displays on the chemical industry, coal, metals, medicinal drugs, sewage disposal, food,