Saturday, September 10, 2022

[Telescope built in the Newtonian configuration with one axis of mount polar-aligned for tracking the sky]

 


Feb. 1936. Harris & Ewing.

https://www.loc.gov/item/2016882124/


https://www.loc.gov/item/2016882125/


https://www.loc.gov/item/2016882126/

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