About: http://webisa.webdatacommons.org/382949653

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	In the containing cylinder there is a piston which has on it centrally a cup-leather, and is provided with a small aperture, which permits the gradual escape of water from it.
http://www.w3.org/ns/prov#wasQuotedFrom	cornell.edu