13-1.     Introduction

SECTION 1.   DEFINITIONS

13-2.     Temperature

13-3.     Hygrometer

13-4.     Hygrothermograph

13-5.     Hygrothermometer

13-6.     Instrument Shelter

13-7.     Maximum Thermometer

13-8.     Minimum Thermometer

13-9.     Psychrometer

13-10.   Psychrometric Calculator

13-11.   Psychrometric Tables

13-12.   Relative Humidity

13-13.   Sling Psychrometer

13-14.   Townsend Support

13-15.   Thermograph

13-16.   Wet-Bulb Depression

13-17.   Temperature and Dew Point Observing Practices - General

13-18.   Dry- and Wet-Bulb Temperatures (NA LAWRS)

13-19.   Dew Point Temperatures (NA LAWRS)

13-20.   Obtaining Psychrometric Data

13-21.   Hygrothermometer (NA LAWRS)

13-22.   Manually or Motor Aspirated Psychrometer (NA LAWRS)

Figure 13-1.     Chilled Mirror Hygrothermometers - Dew Point
                        Comparison Difference in ° F (e.g., HO-83, 1088, etc.)

Figure 13-2.     Chilled Mirror Hygrothermometers - Dew Point
                        Comparison Difference in ° C (e.g., HO-83, 1088, etc.)

13-23.   Psychrometric Computations

13-24.   Station Primary System (NA LAWRS)

13-25.   Hygrothermometer (NA LAWRS)

13-26.   Liquid-in-Glass Thermometer (NA LAWRS)

13-27.   Thermograph or Hygrothermograph (NA LAWRS)

13-28.   Dry-Bulb and Dew Point Temperature (NA LAWRS)

13-29.   Maximum and Minimum Temperature (NA LAWRS)

13-30.   Relative Humidity Computations

13-31.   Station Primary System (ONLY LAWRS)

13-32.   Hygrothermometer Operating Range (ONLY LAWRS)

13-33.   Evaluating Hygrothermometer Data (ONLY LAWRS)

13-34.   Psychrometer (ONLY LAWRS)

13-35.   Dew Point Temperatures (ONLY LAWRS)

13-36.   Psychrometer Observing Procedures (ONLY LAWRS)

13-37.   Psychrometric Evaluations (ONLY LAWRS)

13-38.   Psychrometric Computations (ONLY LAWRS)

13-39.   Dew Point Conversion (ONLY LAWRS)