About: http://webisa.webdatacommons.org/28739089

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	Referring to the drawing, A is a coil, generally of many turns and of a very large diameter, wound in spiral form either about a magnetic core or not, as may be found necessary.
http://www.w3.org/ns/prov#wasQuotedFrom	teslauniverse.com