Opened 9 years ago
Closed 8 years ago
#152 closed enhancement (fixed)
Réaumur temperature scale
Reported by: | Gunther Schadow | Owned by: | Gunther Schadow |
---|---|---|---|
Priority: | minor | Milestone: | Version 2.0 |
Component: | Keywords: | ||
Cc: |
Description
There is also the Réaumur scale:
"The Réaumur scale (°Ré, °Re, °R), also known as the "octogesimal division",[1] is a temperature scale in which the freezing and boiling points of water are set to 0 and 80 degrees respectively. The scale is named after René Antoine Ferchault de Réaumur, who first proposed something similar in 1730.[2]
The Réaumur scale saw widespread use in Europe, particularly in France and Germany as well as Russia, as referenced in works of Dostoyevsky, Tolstoy, and Nabokov.[4][5][6] By the 1790s, France chose the Celsius scale for the metric system over the Réaumur measurements.[2] Its only modern use is in the measuring of milk temperature in cheese production. It is used in some Italian dairies making Parmigiano-Reggiano and Grana Padano cheeses and in Swiss Alp cheeses.[7]"
Change History (9)
comment:1 Changed 8 years ago by
comment:2 Changed 8 years ago by
Milestone: | → Version 2.0 |
---|---|
Owner: | set to Gunther Schadow |
comment:3 Changed 8 years ago by
Need to check the Fahrenheit conversion definition as well, as #54 complains:
- The first conversion function from the function pair "degf(5 K/9)" as declared in "ucum-essence.xml" seems to have the following definition (due to the scale factor in the declaration of the function): fF(x) = x - 459.67 rather than fF(x) = 9/5 x - 459.67. Or should "degf(5 K/9)" be "degf(1 K)"?
I doubt that this is an error, but a misunderstanding. Still need to check.
comment:4 Changed 8 years ago by
It is not an error, because we say the function pair degf(5 K/9) is defined as fF(x) = 9/5 x - 459.67, the function pair's name is "degf(5 K/9) with all these numbers.
comment:7 Changed 8 years ago by
Resolution: | → spam |
---|---|
Status: | reopened → closed |
comment:8 Changed 8 years ago by
Resolution: | spam |
---|---|
Status: | closed → reopened |
comment:9 Changed 8 years ago by
Resolution: | → fixed |
---|---|
Status: | reopened → closed |
0 [degRe] = 0 Cel 80 [degRe] = 100 Cel
(0.8 [degRe] - 0 [degRe]) = 1 K
With:
and thus With:
did I get this about right?