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Matthew Isenburg
Woodward's Patent Solar Enlarger being repaired, rear metal plate detached from body with edge
of mirror showing three bolt holes that will attach it
to brass gear which rotates in the circular collar so the
mirror can tilt as well as rise and falls
2011
Colour image
National Gallery of Canada, The Origins of Photography: The Matthew R. Isenburg and Enhanced Isenburg Collections 1840-1880
LL/45625
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LuminousLint 
@LuminousLint
