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Amoant of rain. 



Temperatorf of dew point 



Temperature or the air. 



Presture of the atmosphere. 



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Mean weiftbt of a cubic foot 

 of air. 



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Mean whole amount ot water 



in a vertical column of 



atmosphere. 





Mean digree of humidity. 

 (Complete saturation = 1.) 



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Mean additional weight of vapour 



required to saturate a 



cubic foot of air. 



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Mean weight of vapour in a 

 cubic foot of air. 



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Mean elastic force of vapour, 



or mean amount of water mixed 



with the air. 



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Mean temperature of dew point. 



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Mean amount, to 10. 



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strength, to Q. 



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