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HELIOSTAT

 

 

This is one of the heliostats from the US Naval expedition to view the transit of Venus. (If you haven't seen the website, it is great. Take a peek here. This will open a new window, and when you finish looking, close the window and my page will still be here.)

(I added the slow motion control and flat mirror). I have the original crate this came in, and it still has the USNO lettering on it.

The next two pictures are from the Transit of Venus.