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TRANS. ST. I,OUIS ACAD. SCIENCE. 



3. — Yearly Mean of Positive Electricity, of Temperature, and of Rela- 

 tive Humidity of the Atmosphere at the hours of 6, 9, 12, 3, 6 and 9, 

 from morning till night, based upon daily observations at those hours 

 from 1861-1872. 



ELECTRICITY. 



TEMPERATURE, F. 



RELATIVE HUMIDITY. 



