About: http://webisa.webdatacommons.org/297328740

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	This apparatus is shown in the accompanying diagram where A is a coil, generally of many turns and of a very large diameter, wound in spiral form, either around a magnetic core or not as may be desired.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com