Image: 1819 brewster - treatise on the kaleidoscope fig 39-40 (kircher - bradley comparison)
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Description: A comparison of the mirror constructions of Kircher (left) and Bradley (right)
Title: 1819 brewster - treatise on the kaleidoscope fig 39-40 (kircher - bradley comparison)
Credit: https://books.google.nl/books?id=76xjAAAAcAAJ&pg=PA177#v=onepage&q&f=false
Author: David Brewster, Athanasius Kircher, Mr. Bradley
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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