Rømer scale

1701 Rømer scale

The book of science

Tom Sharp

Ole Rømer thermometry

Rømer scale

Previous thermometers

To each his own

Other scientists had established temperature scales; the genius of Huygens, Renaldini, and Rømer was to choose reproducable fixed points that others could use to calibrate their thermometers.

See also in The book of science:

Readings on wikipedia: