Air pressure altitude

Air pressure was found to depend on altitude. Pascal was too sick to go himself, so sent his brother in law up a mountain, saw mercury column descend from 30” to 27”. Showed atmosphere would have finite height of ~100 mi
 Blaise Pascal France 1648 Air pressure altitude

Air pressure was found to depend on altitude. Pascal was too sick to go himself, so sent his brother in law up a mountain, saw mercury column descend from 30” to 27”. Showed atmosphere would have finite height of ~100 mi