About: http://webisa.webdatacommons.org/442142570

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	Reference hydrometers should be made of smooth, transparent glass, free of bubbles or other imperfections.
http://www.w3.org/ns/prov#wasQuotedFrom	nist.gov