ScientificAmerican1899-11-04.jpg Scientific American 1893-05-06ThumbnailsScientific American 1903-08-08Scientific American 1893-05-06ThumbnailsScientific American 1903-08-08Scientific American 1893-05-06ThumbnailsScientific American 1903-08-08Scientific American 1893-05-06ThumbnailsScientific American 1903-08-08Scientific American 1893-05-06ThumbnailsScientific American 1903-08-08
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