London in the 19th century

1
London in the 19th century

• Describe what it was like in Soho.

2
Cholera outbreak

• Soho - September 1854.
• Describe what happened during the cholera
  outbreak.
• How did Dr Snow describe the outbreak?

3
John Snow

• What was John Snows occupation?
• Where did he live?
• Why was this helpful?
• What did he believe about the spread of cholera?

4
Dr Snows map

• What did Dr Snow mark on his map?
• What did this suggest about the source of the
  outbreak?

5
The evidence in the water

• Describe what Dr Snow saw under his microscope
  when he looked at water from the Broad Street
  pump.

6
The pump handle is removed

• Did the local parish council really believe what
  John Snow told them?
• Why did they agree to remove the handle of the
  pump?
• Did it make a difference?

7
No cases at the Soho brewery

• Not everyone believed the pump was to blame.
• They pointed to the fact that there were no cases
  at the brewery on the same street as the pump.
• What did Dr Snow discover about the brewery
  workers?

8
The Soho workhouse

• Did the people in the workhouse catch cholera?
• Did this seem to contradict Dr Snows theory?
• What did Dr Snow discover at the workhouse?

9
The cholera deaths in Hampstead

• Explain how Dr Snow linked the case of cholera in
  a family living in Hampstead to the Broad Street
  pump. Did this support his theory?

10
The case for contaminated water

• What did other scientists think was the cause of
  cholera?
• Why did the water companies support this theory
  rather than John Snows theory?
• What did the Reverend Henry Whitehead think was
  the cause of cholera?
• How did the evidence he collected support Dr
  Snows theory?

Dr. John Snow (1813-1858)
11
25 years later

• Twenty-five years after John Snows death a
  bacterium that causes the disease was discovered.
• How did this help scientists to accept that
  water, contaminated with sewage, spreads cholera?