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Re: an interesting letter



Anyone have a copy of a teacher evaluation form that is short and
appropriate? Thenks.

Also, one more request on the construction of a teflon type bearing.
Does anyone know the basic elements and construction of a bearing that
would have work off a horizontal post that is firmly attached a wall.
The bearing would allow a horizonal piece of wood to pivot around the
post (post would or could go through the wood) and and remain in postion
when released. The position of the bearing would be fairly well balanced.

A similar type of bearing is used in Dobsonian telescopes to
position the telescope along the altitude angle.

Thanks again for your help.

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Tom K. McCarthy Email:mcca6300@spacelink.msfc.nasa.gov