A friend gave me a gadget that looks like some sort of solar tracker.
It has a convex lens on top which looks to have a mirrored back and
a small hole in the middle.  Underneath the device is a circular
scale marked for elevation and azimuth.  If you hold the thing
straight up uver your head and look in the bottom, a tiny bright
spot shows where the sun is.  I'll try and get some pictures of it.

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