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Rosen Foriagraph
ORTHOPTIC INSTRUMENTS
heterophoria test; foriagraph
c.1930
metal

Foriagraph consisting of black metal battery-compartment handle, on-off switch, rectangular panel bearing white bakelite (?) chart on front.


1999.3193

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thumbnail Rosen Foriagraph
c.1930
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thumbnail Rosen Foriagraph
c.1930
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