About: http://webisa.webdatacommons.org/86922639

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	Lewis practiced particularly with the octant (fig. 1), an instrument designed primarily for use at sea but used also on land to observe altitudes of the sun or a star for determining latitude.??????[5]
http://www.w3.org/ns/prov#wasQuotedFrom	unl.edu