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Hello,

We have the Exploratorium's "Visible Effects of the Invisible" exhibit 
component.  The patterns of "fountains" we are able to produce do not 
match the examples shown on the label.  In particular, the examples all 
show standing wave patterns with a node at one and and an antinode at 
the other end, whereas our tube seems to be producing a node at one end, 
and behaving somewhat inconsistently at the other end.  Can anyone help 
me figure out why this is happening?

Thanks
Susan Timberlake
Exhibit Developer
Museum of Science, Boston

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