Glasgow’s history is immensely rich and varied. It spans centuries and great things have been accomplished by its ardent and skillful population. The city has achieved distinction in the arts and sciences, in medicine, economics and engineering. Its people are creative, hard working and entrepreneurial and they built an industrial and trading powerhouse. The names of two men, James Watt and Lord Kelvin ( William Thomson ), have been immortalized by their assignment to international units of power and temperature respectively. Both men made major discoveries while they were living and working in Glasgow. With James Watt’s realization that a separate condenser would greatly increase the efficiency of the steam engine, the Industrial Revolution was born. The key components of this revolution, coal, iron ore, water, ingenuity and a hard-working population were all to hand. Glasgow thus became the Second City of the Empire, after London, and in view of the pre-eminence of the British Empire, Glasgow was recognized as a great world city. It duly celebrated its greatness with four International Exhibitions; in 1888, 1901, 1911 and 1938.