Address delivered on laying the corner stone of the Academy of Natural Sciences of Philadelphia, May 25, 1839 / by Walter R. Johnson ; published by order of the Academy.

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Our exhibition ‘1880 THAT: Christine Sun Kim and Thomas Mader’ in Gallery 2 is closed this afternoon (Tuesday 17 February) due to essential maintenance work. Thank you for your understanding.

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Walter Rogers Johnson

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Address delivered on laying the corner stone of the Academy of Natural Sciences of Philadelphia, May 25, 1839 / by Walter R. Johnson ; published by order of the Academy.