Plate XVIII. Meteorological ObservdhMS for the month of .My, 1873. 



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 "^.1 \ Z 3 4 5 6 7 . . 8 . , ? . . . '0. . . '.' . . '.^ . . '■^. . '.*... 'S Ig 17 18 !9 CO -21 22 23 24- 25 26 27 28 29 30 



Barometer . 



DiyMIl) Thermometer 



Wet Bulb Themometef 



Temperatiire of Sea Surface 



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