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| Test setup for telescope mirror being inspected by Bill Mueller, former Prin Biology faculty | Don Loomis, world renowned optician, grinding Principia 16" telescope mirror |
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| Our mirror | Warren Offutt's 24" telescope similar to Principia telescope |
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| Telescope RA drive mechanism | Principia Telescope before test and painting in Tucson, AZ |
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| Boston RA and DEC drive gears and control paddle | Focus mechanism components |