Resistance thermometers can be designed for temperatures between −328 and 932 °F.
Outside of that range, resistance becomes non-linear or doesn’t depend on temperature.
Most resistance thermometers are designed to work immersed in the environment or liquid that they measure;
later, Samuel Pierpont Langley showed, with a similar design, the ability to determine
a temperature at a distance.
Carl Wilhelm Siemens, without a criminal intent, also became known as Sir Charles William Siemens.
See also in The book of science:
Readings in wikipedia: