(共45张PPT)
There are some great scientific achievements that have changed the world. Can you name some of them?
What do you know about great scientists?
1. Who discovered that objects in water are lifted up by a force that helps them float?
If you put an object into water the water pushes the object up. It rises and partly floats. The force of the water pushing it up is the same as the weight of the object.(共8张PPT)
John
Snow
(1813-1858)
John
Snow
was
born
in
York
on
March
15th,
1813,
the
oldest
of
nine
children.
York
London
His
father
worked
as
a
laborer.
While
poor,
his
parents
were
determined
to
give
their
children
whatever
educational
opportunities
they
could
afford.
He
was
educated
at
a
private
school
in
his
native
city
until
the
age
of
fourteen,
when
he
was
apprenticed
(当学徒)
to
William
Hardcastle,
a
surgeon
(外科医生)
living
at
Newcastle-on-Tyne.
After
serving
for
a
short
time
as
a
surgeon
and
unqualified
assistant
during
the
cholera
epidemic
of
1831-1982,
he
became
in
October
1836
a
student
at
the
Hunterian
School
of
medicine
in
Great
Windmill
Street,
London.
He
began
to
attend
the
medical
practice
at
the
Westminster
Hospital
in
the
following
October.
He
graduated
M.D.
of
the
University
of
London
on
20
Dec.
1844,
and
in
1850
he
was
admitted
a
licentiate
of
the
Royal
College
of
Physicians.
He
designed
a
chloroform
inhaler(氯仿吸入器),
described
in
his
book,
On
Chloroform
and
other
Anesthetics,
published
in
1858.
Dr.
Snow
was
also
a
prominent
anesthesiologist(麻醉师)
What
else
was
he
famous
for?
