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<< Math World notebooks not working?

I must be missing something . All the notebooks that I download from Mathworld return error in the << commands. For example. Look at

http://mathworld.wolfram.com/EllipticCylindricalCoordinates.html

<< MathWorld`CurvilinearCoordinates

During evaluation of 

In[5]:= Get::noopen: Cannot open MathWorld`CurvilinearCoordinates`.
Out[5]= $Failed

I have tried other notebooks b, but the resource are no longer working. I am using Math 11.01 in MacPro
POSTED BY: Jose Calderon
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What George says is true. However, the particular error message that you are having indicates that the package could not be found. If the directory that you put the package in is not listed in the value of 

$Path

Then Mathematica cannot find it and that error will be generated.
POSTED BY: David Reiss

The notebooks on MathWorld have been 'broken' for some time. I will ask the person who used to be in charge of the site -- I'm at the WTC -- but don't get your hopes up.

In some cases, they can be repaired without too much trouble.
POSTED BY: George Woodrow III
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