title: Discrepancies in the values of standard atmospheric pressure: the riddle resolved.
abstract: Over half a century ago, when I took Beginning Physics at university, I was bothered by the anomaly that normal air pressure (which is arbitrary anyhow) was taken to be 1.013250 bar instead of a sensible 1.000000 bar. My professor could not explain why, nor could any of the many other scientists whom I have asked since then. Now in retirement, I have made a laborious search in utterly uncharted territory and discovered the answer.
authors.affiliation: North Central College, Naperville, IL 60566, USA. OpaRobert@aol.com
authors.forename: R W
authors.initials: RW
authors.lastname: Shoemaker
mesh_terms: D000399:Air Pressure; D001274:Atmospheric Pressure; D049670:History, 17th Century; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D010825:Physics / Q000266:history*; D012680:Sensitivity and Specificity