0730 Computations of Alritiule l)y Barometric Observations. 



0740 Computations of AUitule by Tlaermometric Observa- 



tions. 

 0750 Variations and Oscillations — Periodical. 



0760 Variations and Oscillations — Non-periodical. 



0770 Waves due t") Volcanic or other Disturbances. 



TEMPERATURE AND RADIATION. 



Atmospheric Temperature. 



See also J 02. 

 0800 General. 



0810 Distribntiim at Earth's Surface — Isotherms. 



0820 Distribution, Vertical. 



0830 Variations, Periodical. 



084J Valuations, Secular or Non-periodic. 



0850 Earth Temperature. Surface. 



0860 Earth Temperature — Vertical Variation. 



0870 Frozen Soil. 



0880 Sea Temperature. See also J 44. Surface. 



0890 Sea Temperature — Vertical Variation. 



0900 Frozen Sea. 



0910 River and Lake Temperature. 

 0920 Spiing-s — Temperature. 



0930 Solar Raiiation. See also E 4200. 



0940 Solar Radiation — Secular Change. 



0950 Sunshine. 



0960 Atmospheric Absorption of Solar Heat. 



0970 Terrestrial Radiation. See also C 42\0. 



AQUEOUS VAPOUR AND RAIN. 



Vapour. 



See also J 63. 



1000 General. 



1010 Vapour Tension. 



1020 Humidity. See a'so C 1890. 



1030 Vapour — Distribution, Vertical. 



1040 Vapour — Variation, Periodical. 



1050 Evapoiation. See also C 1840. 



1060 Dew Formation. 



1070 Fog Formation and Distribution. 



1080 Cloud Formation. 



1090 Cloud Varieties of Form. 



1100 Cloud Altitudes. 



(1--177G) I! 2 



