About: http://webisa.webdatacommons.org/127081404

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	All sides except the aperture were heated electrically by a heater of platinum-rhodium wire.
http://www.w3.org/ns/prov#wasQuotedFrom	opticsinfobase.org