 Complete the following phrase:  The first era, the era of industrialization, roughly covered the years from 1800 to 1938. In these days, world expositions were largely focused on trade and displayed technological advances and inventions. World expositions were platforms for state-of-the-art science and technology from around the world. The world expositions of 1851 London, 1853 New York, 1862 London, 1876 Philadelphia, Paris 1878, 1888 Barcelona, 