1. Great scientists Unit 1 Reading John Snow Defeats “King Cholera”
执教者：嵊州市黄泽中学 吴义福

3. incurable(hard to cure) fatal
How?
the severest
John Snow Defeats “King Cholera”
King
Cause
expert n./adj.
doctor
physician
deadly
incurable(hard to cure)
fatal

4. Causes: Two theories (ways of spreading)
First: Multiply in the air
Second: Absorb with the meals
Which one is more believable? (Find out some verbs)
Suspect the correction
Need evidence
Find out why/evidence
Begin his enquiry
Gather information

5. How to collect evidence?
First:
He _______________ the exact places where
all the dead people had lived.
It gave him ______________________________.
marked on a map
a valuable clue about the cause

6. Broad Street Public house Many deaths happened here.
No death happened here.
Conclusion: It seemed that the water from the pump
was to blame.

7. Next: What happened to the pump water?
The astonishing fact:
The water came from the polluted river.
The astonished people’s action:
Remove the handle and
stop using the water.
The astonishing result:
The disease slowed down.
Conclusion: He had shown that cholera was spread by germs, not in a cloud of gas.

8. Then: What extra evidence did he find?
two other deaths
A woman and her daughter
who lived far away but drank
the water also died.
draw a conclusion (announce) with certainty
The polluted water
carried the disease.

9. Last: How to prevent the disease from happening again?
Examine the source of all the water supplies.
2.Not to expose people to polluted water.
Finally “King Cholera” was defeated.

10. Great scientists,
Good qualities.
What and why?

11. Develop your thinking ability:
passive----active
Creative thinking:
negative----positive
impossible----possible
find a problem
Logical thinking:
analyze the problem
solve the problem
specific situation
Specific thinking:
scientific method
satisfactory result

12. Think and Talk:
Find, analyse and solve a specific problem in your study or your life.

13. Homework 1.Find, analyse and solve a specific problem
in your life or your study.
2. Try to retell the passage according to the
structure on Bb.