How did he do that?

Collection:: Images from the History of Medicine (IHM)
Format:: Still image
Genre(s):: Postcards
Copyright:: This item may be under copyright protection. Please ask copyright owner for permission before publishing.
Extent:: 1 postcard ;.
NLM Unique ID:: 101458290 (See catalog record)
NLM Image ID:: D01068
Permanent Link:: http://resource.nlm.nih.gov/101458290

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