Hygrometer Document Downloads
From 1784, the publication (in German) "Versuch uber die Hygrometrie" by Horace Benedict de Saussure is available below (466 pages):
From 1889, a set of hygrometric tables published by the US Signal Service is available below (27 pages):
An 1895 booklet titled 'Humidity and Weather Forecasts' published by the Julien P Friez Company is presented below (19 pages):
From 1913, the Tycos Hygrometer Book is available for download below (33 pages):
Perhaps from 1928, a R Fuess pamphlet (in German) called 'Humidity Measurement with Hair Hygrometers, Hair Hygrographs, and Meteorographs' may be downloaded below (4 pages):
The following Psychrometric Tables were first published by the US Weather Bureau in 1900. Charles F Marvin was later the Chief of the US Weather Bureau for 21 years. This is the reprint from 1937. These tables were the standard reference in the US for calculating relative humidity and dew point temperature from sling psychrometer data for the first half of the 20th century.
From 1945, the booklet "Relative Humidity Tables for Use with Taylor Hygrometers" is available below (7 pages):
An undated set of Russian psychrometric tables may be downloaded below. They're in Russian and came with a Soviet Army Mk2 manual meteorological station (92 pages):
