Both equally artefacts are compared in vacuum and in air. By comparing The 2 artefacts of identical nominal bodyweight, the big quantity distinction demonstrates the air buoyancy and so ends in a extremely correct perseverance of air density. The buoyancy artefacts are predominantly used for the M_one vacuum mass comparator. https://bailing-wire68901.bloguetechno.com/new-step-by-step-map-for-bailing-wire-66258755