| This measurement is a holdover from the use of an instrument called a sling psychrometer. |
| A hygrothermograph or sling psychrometer can be used to monitor relative humidity daily. |
| The humidity of the air was observed both by August's psychrometer and Saussure's hygrometer. |
| Make observations with the wet-bulb thermometer or the sling psychrometer as a part of your regular daily weather record. |
| Two fresh leaf discs were punched from the centre of each blade, and the water potential of the discs was measured using a thermocouple psychrometer. |
| They are not as accurate as the aspirating psychrometer and are not recommended. |
