Electron tube bulb temperature ratings.

"Electronic Components Laboratory, Contract no. AF 33 (600)-32562, Project no. 4156."

Reduction of the photographic records of the barometer, 1874 to 1876, and of the dry-bulb and wet-bulb thermometers, 1869 to 1876, made at the Royal Observatory, Greenwich, under the direction of W. H. M. Christie, astronomer royal. (Forming appendix I. to the volume of Greenwich observations for the year 1887).

On cover: Reduction of Greenwich meteorological observations. pt. II. Barometer, 1874-1876, & thermometers, 1869-1876

Psychrometric tables for obtaining the vapor pressure, relative humidity, and temperature of the dew-point : from readings of the wet and dry bulb thermometers /

At head of title: U.S. Dept. of Agriculture, Weather Bureau.