The Cartesian diver is a nice toy and an intriguing physics instrument.1–6 Recently we reported an experimental study on the statics and dynamics of the Cartesian diver,7 using a specially designed apparatus that is much larger than the usual models. The Cartesian diver is an interesting example of the so-called “fold catastrophe,” the pressure being the control parameter,7 and this behavior is well observed in our apparatus.

1.
Hasan
Fakhruddin
, “
Cartesian diver and riser
,”
Phys. Teach.
41
,
53
(Jan.
2003
).
2.
Robert M.
Graham
, “
An extremely sensitive Cartesian diver
,”
Phys. Teach.
32
,
182
183
(March
1994
).
3.
Terry
Ragsdale
, “
Cartesian diver
,”
Phys. Teach.
27
,
306
(April
1989
).
4.
R. B.
Knollenberg
III
, “
An automated Cartesian diver apparatus
,”
Phys. Teach.
27
,
51
(Jan.
1981
).
5.
Edward V.
Lee
, “
Cartesian diver with pressure head
,”
Phys. Teach.
19
,
416
(Sept.
1981
).
6.
Haym
Kruglak
, “
The rising Cartesian diver
,”
Phys. Teach.
13
,
68
69
(Feb.
1975
).
7.
J.
Güémez
,
C.
Fiolhais
, and
M.
Fiolhais
, “
The Cartesian diver and the fold catastrophe
,”
Am. J. Phys.
70
,
710
714
(July
2002
).
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