An electrical device for mirror-tracing.
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Humans↗
Biomedical subjects
N V SCHEIDEMANN
Publications and source records attributed to N V SCHEIDEMANN.
A mirror-tracing pneumo-cardiograph.
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Humans↗
A five-pointed starpattern for mirror-drawing.
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Humans↗
A ruler for scoring mirror-tracing errors.
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Humans↗
A collapsible mirror-tracing apparatus.
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Humans↗