Instructions for observing air temperature, humidity, and direction and force of wind
Division of Hydrography Circular
2
By: Water Resources Division, U.S. Geological Survey
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Abstract
Description of instruments.-The temperature and humidity of the air are obtained from the simultaneous observation of a pair of mercurial thermometers termed the dry and the wet bulb. The air temperature is given by the dry-bulb thermometer, and the humidity is obtained from the combined readings of both. The wet-bulb thermometer differs from the dry-bulb thermometer only in having its bulb covered with thin muslin, which is wetted in pure water at each observation.The two thermometers are fastened in a light metal 'or wooden frame. To this frame is to be attached a stout cord for the whirling of the thermometers, which is an essential part of every observation.
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Instructions for observing air temperature, humidity, and direction and force of wind |
| Series title | Division of Hydrography Circular |
| Series number | 2 |
| DOI | 10.3133/70046395 |
| Year Published | 1892 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Washington, D.C. |
| Description | 7 p. |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |