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Hungary (Cording to recent tests made)

1922 cording to recent tests made by the Chicago Commission on Ventilation and accepted as standard by ventilating engineers, human comfort under ordinary conditions of house circulation in winter requires a relative humidity of about 36 per cent at a temperature of 70 degrees.

With higher temperatures the same degree of humidity becomes increasingly uncomfortable; and, conversely, a higher degree of humidity makes a lower temperature possible without discomfort within the range of ordinary indoor temperatures. In public halls where crowds are assembled the air becomes rapidly saturated if there is not proper ventilation, owing to the moisture given off by lungs and sweat glands, and this, more than any lack of oxygen or accumulation of carbon dioxide in the air, is the cause of the stuffiness commonly found in such places. Humidity is also of great importance in many industries, especially in those employing drying processes. Both absolute and relative humidity are measured by instruments called hygrometers. (q. v.)