People

• When was the germ theory of disease discovered?

  In the 1860s by Louis Pasteur
• Who invented the first flushing toilet and when?

  John Harrington in 1596
• Who developed a powerful microscope in the 17th century?

  Robert Hooke
• What was the significance of the 38-mile water supply system built by Hugh Middleton?

  It supplied clean water to 30,000 people in London