About: http://webisa.webdatacommons.org/395517906

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	The resourceful scholar also invented the so-called perfect compass, a hand-held mechanical tool with an adjustable arm pivoting around a fixed arm, to trace ellipses and other conic sections.
http://www.w3.org/ns/prov#wasQuotedFrom	muslimheritage.com