Optical Projection of Opaque Objects GM Hopkins Original Advertisement AD8-P28
Optical Projection of Opaque Objects GM Hopkins Original Advertisement AD8-P28
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This is an original ad taken from Scientific American October 29th 1892. This is a small ad, not more than an inch or two in either direction - please see the picture next to a coin for exact scale. See pics for condition.
Optical Projection of Opaque Objects Geo. M. Hopkins Original Advertisement AD8-P28
Optical Projection of Opaque Objects Geo. M. Hopkins Original Advertisement AD8-P28
