About: http://webisa.webdatacommons.org/159351503

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 disks at top and bottom are a vibratory device with a twofold use; and no other material than that of which they are wrought would have the same properties, the same achievable rates of vibrations.
http://www.w3.org/ns/prov#wasQuotedFrom	eldritchdark.com