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Air pumps allowed experimenters to create a partial vacuum in the glass bell at the top of the device by pumping air out using the handle
Marine biological studies of the Royal or regal angelfish
Behelzende eene naauwkeurige Beschrijving der Amboinsche haagdis
Catherine Howard
Ibsen, Henrik (1828-1906) Product:Greetings card Air pumps allowed experimenters to
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