ScientificAmerican1899-11-04.jpg Scientific American 1892-04-09ThumbnailsScientific American 1913-07-12Scientific American 1892-04-09ThumbnailsScientific American 1913-07-12Scientific American 1892-04-09ThumbnailsScientific American 1913-07-12Scientific American 1892-04-09ThumbnailsScientific American 1913-07-12Scientific American 1892-04-09ThumbnailsScientific American 1913-07-12
The Great Telescope of the Paris Exposition of 1900. Apparatus for polishing the mirror. Detail of regulating apparatus. Mounting of the Siderostat.



Source: Steve Kirch, collector, and creator of a great website about SCIENTIFIC AMERICAN in the past

Restoration by: magscanner