Portable tent type of camera obscura placed on

Portable tent type of camera obscura placed on a table so that it could be used to draw the landscape projected down onto sheet of white paper on table. From The Complete Dictionary of Arts and Sciences, edited T.H. Crocker, T. Williams and S. Clarke, London, 1764. Engraving

1764 Crocker Dictionary Draw Edited Lens Obscura Onto Optics Placed Portable Projected

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