Both equally artefacts are compared in vacuum and in air. By comparing the two artefacts of identical nominal bodyweight, the large quantity change demonstrates the air buoyancy and thus leads to a very precise willpower of air density. The buoyancy artefacts are primarily used for the M_one vacuum mass comparator. https://emilianodgxly.widblog.com/85894986/the-smart-trick-of-bailing-wire-that-no-one-is-discussing