About: http://webisa.webdatacommons.org/63355886

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	Recharging telescopes.-In order to maintain the interiors free from moisture the telescopes must be periodically recharged with a dry gas, such as nitrogen or helium, which has been passed through a filter of silica gel.
http://www.w3.org/ns/prov#wasQuotedFrom	maritime.org