American Essayist and Poet Ralph Waldo Emerson mb-code DCA_111973 including jars marked 'Oxygen' and

Description

including jars marked 'Oxygen' and 'Hydrogen'

Watermarked 'J Whatman 1804'

by Waddington

The device used gravity by suspending a patient (most likely a child) from the balance arms

whilst pensioners are fleeing

American Essayist and Poet Ralph Waldo Emerson mb-code DCA_111973 including jars marked 'Oxygen' and

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