There were some 100,000 objects, displayed along more than ten miles, by over 15,000 contributors. Britain, as host, occupied half the display space inside, with exhibits from the home country and the Empire. The biggest of all was the massive hydraulic press that had lifted the metal tubes of a bridge at Bangor invented by Stevenson. Each tube weighed 1,144 tons yet the press was operated by just one man. Next in size was a steam-hammer that could with equal accuracy forge the main bearing of a steamship or gently crack an egg. There were adding machines which might put bank clerks out of a job; a ‘stiletto or defensive umbrella’– always useful – and a ‘sportsman’s knife’ with eighty blades from Sheffield – not really so useful. One of the upstairs galleries was walled with stained glass through which the sun streamed in technicolour. Almost as brilliantly coloured were carpets from Axminster and ribbons from Coventry.