Both artefacts are compared in vacuum and in air. By evaluating The 2 artefacts of equivalent nominal body weight, the massive quantity variation displays the air buoyancy and so ends in a very correct dedication of air density. The buoyancy artefacts are mostly utilized for the M_one vacuum mass comparator. https://sethgbqft.bloguerosa.com/30360002/the-ultimate-guide-to-bailing-wire