{"version":"1.0","type":"link","title":"Rectangulus - Newikis","description":"The rectangulus is an astronomical instrument, invented by Richard of Wallingford around 1326. Dissatisfied with the limitations of existing astrolabes, Richard developed the rectangulus as an instrument for spherical trigonometry and to measure the angles between planets and other astronomical…","provider_name":"Newikis","provider_url":"https://newikis.com","cache_age":86400,"thumbnail_url":"https://upload.wikimedia.org/wikipedia/commons/f/f2/Abbot_Richard_Wallingford.jpg","thumbnail_width":696,"thumbnail_height":748}