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the WATER CLOCK. KYOTO University of Education Shigenobu KOBAYASHI. This is the WATER CLOCK. It is the story 1400 years ago. This is the WATER CLOCK model. Contents. 1.Why was the WATER CLOCK produced? 2.The history about the WATER CLOCK in Japan. - PowerPoint PPT Presentation
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the WATER CLOCKthe WATER CLOCKKYOTO University of EducationKYOTO University of Education
Shigenobu KOBAYASHIShigenobu KOBAYASHI
This is the WATER CLOCKThis is the WATER CLOCK• It is the story 1400 years ago.
This is
the WATER CLOCK model.
ContentsContents• 1.Why was the WATER CLOCK produced?• 2.The history about the WATER CLOCK in Japan.• 3.What is the WATER CLOCK(1)?• 4.The pictures of the WATER CLOCK.• 5.What is the WATER CLOCK(2)?• 6.Why is it proportionally?• 7.Relation between the WATER CLOCK and
education.
Why was the WATER CLOCK produced?Why was the WATER CLOCK produced?
A long time ago• Ancient society progressed It is managed for 24 hours
• Symbol of power to govern time Go to next page
DAY NIGHT LONG
SUNDIAL O.K. N.G. O.K.
SANDGLASS O.K. O.K. N.G.
WATER CLOCK O.K. O.K. O.K.
The history aboutThe history about the WATER CLOCK in Japan. the WATER CLOCK in Japan.
• The water clock was in a capital.
Year Capital Water Clock
660 Asuka In Asuka
667 Ohmi In Ohmi
672 Nara The water clock has not been discovered.
794 Kyoto The water clock has not been discovered.
KyotoOhmi
AsukaOsaka
What is the WATER CLOCK(1)??What is the WATER CLOCK(1)??• Parts 1.Water
2.Water tank
3.Siphon tube (This tube can carry water little by little. )
4.Doll
5.Stick(The doll has
this stick with scale.) 1,2
4
3
5
The pictures of WATER CLOCK.The pictures of WATER CLOCK.
Station Ohmi Shrine
In OhmiIn Ohmi
Stick The 4 tanks made from stones is placed in the shape of stairs.
In AsukaIn AsukaWhole view
The ruins of Mizuoti
The water clock was here
Logs
(This is the marks of the pillar of the building)
•
Immediately after unearthing
Model
The water clock
What is the WATER CLOCK(2)??What is the WATER CLOCK(2)??• Usage 1.4 water tanks is full of water.
2.Water is carried to next water tank
by Siphon tube.
3. An officer supplies water to the top tank.
4. Water goes into a last tank in proportion to time. ( Next page)
5.The stick which a doll has floats.
6. An officer tells time.
7. An officer sounds a bell
Why is it proportionally?Why is it proportionally?• Key Point is the Water level !!
By placing some tanks, the water level of the 3rd tank is kept constant.
So, water moves in proportion to time by using siphon tube !!
(We can see)
Average rate of change about water level Time
Function (proportionality)
Relation between Relation between the WATER CLOCK and education.the WATER CLOCK and education.
• Theme : The WATER CLOCK : inclosing subject
History : History of Kyoto
Changes of a capital
An old time system
Science : a Water level
a Water pressure
Mathematics : Time
Function (proportionality)
Thank you
