Analysis of information sources in references of the Wikipedia article "Valentia Island" in Danish language version.
Valentia Slate Memorial, showing cross cuts of cable spanning the Atlantic from 1853 to 1966, Year: 2006, Price: 4,500.00
Valentia Island, which has an area of 6.371 acres [2.578 hectares] and is extremely fertile and tolerably well cultivated,[...]
{{cite report}}: Mere end en |archivedate= og |archive-date= angivet (hjælp); Mere end en |archiveurl= og |archive-url= angivet (hjælp); Mere end en |deadurl= og |url-status= angivet (hjælp); Ukendt parameter |deadurl= ignoreret (|url-status= foreslået) (hjælp)Also known as "The Longitude Field". Prior to the transatlantic telegraph, American longitude measurements had a 850-meter (2.800-foot) uncertainty with respect to European longitudes. A temporary longitude observatory was built adjacent to the Foilhommerum Cable Station to facilitate synchronized longitude observations with Heart's Content, Newfoundland.
{{cite report}}: Mere end en |archivedate= og |archive-date= angivet (hjælp); Mere end en |archiveurl= og |archive-url= angivet (hjælp); Mere end en |deadurl= og |url-status= angivet (hjælp); Ukendt parameter |deadurl= ignoreret (|url-status= foreslået) (hjælp)Valentia Slate Memorial, showing cross cuts of cable spanning the Atlantic from 1853 to 1966, Year: 2006, Price: 4,500.00
Also known as "The Longitude Field". Prior to the transatlantic telegraph, American longitude measurements had a 850-meter (2.800-foot) uncertainty with respect to European longitudes. A temporary longitude observatory was built adjacent to the Foilhommerum Cable Station to facilitate synchronized longitude observations with Heart's Content, Newfoundland.