Origin of dew point
Examples from the Web for dew point
The Dew-point apparatus, now discontinued, approximates very closely in its readings to the dry and wet bulb thermometers.
Temperature 229 above the average, and the complement of the dew-point 240 below the mean of the two preceding years.
Hence the utility of instruments for determining the dew-point.A Treatise on Meteorological Instruments|Henry Negretti
The temperature at which the haze first appears is the dew-point.Seasoning of Wood|Joseph B. Wagner
At this point the figures in the vertical column give the dew-point of the air at the time of your observation.Practical Exercises in Elementary Meteorology|Robert DeCourcy Ward