Notes: "The camera lucida is a device for artists that allows them to see their drawing and the object they are drawing superimposed on each other, thanks to a prism. It doesn't project an image onto the paper, but rather into your eye. This appears to be an especially nice ones with two lenses, one for magnifying the image and one for reducing it, as well as a sun shade lens. The arm that clamps to the edge of the table or drawing board telescopes to bring the prism closer to the artist's eye. This on includes an advertising flyer, but no instructions. It does provide some information on how the camera lucida is used. There is no maker's name, only a mention in the advertising flyer that ""W. Bly"" was the sole agent for sales."
