Gupima Terimometero Ukoresheje Ingingo Ebyiri Zihamye za Celsius
Mu 1742, Anders Celsius — umuhanga mu nyenyeri w'Umusuwede wo muri Kaminuza ya Uppsala — yashyikirije inyandiko Akademiya y'Ubumenyi y'Ubwami bw'Ubuswede, asaba urwego rw'ubushyuhe rushingiye ku ngingo ebyiri z'isoko zishobora gusubirwamo: ahantu amazi acika urubura n'ahantu amazi achemeka. Icyerekezo cye cy'ingenzi ni uko iyi mihindagurikire y'ibice ibera ku bushyuhe buhamye, rusange munsi y'igitutu cy'ikirere gisanzwe (760 mmHg / 101,325 kPa).
Urwego rwa mbere rwa Celsius rwari ruhinduye ugereranyije n'urwo dukoresha uyu munsi: yashyize 0° ku hantu amazi achemeka na 100° ku hantu amazi acika urubura. Urwego rwahinduwe nyuma y'urupfu rwe (1744), birashoboka ko byakozwe na Carl Linnaeus cyangwa umucuranzi w'ibikoresho Daniel Ekström.
Iyi mirimo isaba ubuhanga bwitondewe — mercure igomba kugera ku miterere y'ibanga ku ngingo y'isoko buri yose. Celsius yanditse ko ihinduka ry'igitutu rya 27 mmHg rihindura ahantu amazi achemeka hafi 1°C.
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