ScientificAmerican1899-11-04.jpg Scientific American 1893-06-24ThumbnailsScientific American 1899-11-25Scientific American 1893-06-24ThumbnailsScientific American 1899-11-25Scientific American 1893-06-24ThumbnailsScientific American 1899-11-25Scientific American 1893-06-24ThumbnailsScientific American 1899-11-25Scientific American 1893-06-24ThumbnailsScientific American 1899-11-25
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