About: http://webisa.webdatacommons.org/91553429

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	four or five hours, especially at spring or the fall of the leaf, at which time he used to employ about six weeks in his laboratory, the fire scarce going out night or day.
http://www.w3.org/ns/prov#wasQuotedFrom	hermetics.org