How to look at the thermometer from the temperature is cold or hot
Room temperature at 20 degrees or so, in more than 25 degrees is hot
If more than 20 of the general can be hot, if the cold down on the 10, have to look at the outside environment, such as in the northeast, it may be felt on the heat of 10 degrees, in the south, may be cold on the 10 degree. Hot and cold is a feeling, can not explain the specific temperature.
Commonly used is the mercury and diesel thermometer, you look at the end of the line to which scale that the temperature is high.
