TABLE OF CONTENTS. 



Monthly Mean Values at Certain Hours of the Day 

 Diurnal Range of the Temperature .... 

 Annual Fluctuation of the same .... 

 Extreme Temperatures observed .... 

 Relation between Temperature and the Direction of the Wind 

 Relation between Temperature and the Summer Rains 

 Relation between Temperature and Precipitation in Winter 

 Mean Annual Temperatures and Secular Change . 

 Supposed Anomalies in the Annual Fluctuation of the Temperature 

 Method of Discussing the Observations of the Wind 

 Relative frequency of each Wind .... 

 Resulting Directions of the Wind .... 

 Atmospheric Precipitation, number of Days 

 Atmospheric Precipitation, amount of . 



Relation of Rain (or Snow) to the Direction of the Wind . 

 Number and Distribution of Thunder Storms 

 Distribution of Fogs ..... 



Occurrence of Frost ..... 



Distribution of Hail ..... 



State of the Weather, fair, cloudy and variable Days 

 Dependence of Fair W^eather on the Direction of the Wind 

 Dates of Earthquakes ..... 



Observations and Discussion of the Appearance of Northern Light; 

 Appendix : Monthly Extremes of the Barometric Pressure 



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ARTICLE IV. Results of METEOROLoaicAL Observations made at Marietta, Ohio, 

 BETWEEN1826 AND 1859, INCLUSIVE. By S. P. HiLDRETH, M.D. To which 

 are added Results of Observations taken at Marietta by Mr. Joseph Wood, 

 between 1817 and 1823. Reduced and Discussed by the Smithsonian 

 Institution. By Charles A. Schott. Accepted for Publication June, 

 1867. Published September, 1867. 4to. pp. 52. Fourteen Wood-cuts 

 Introduction ...... 



Record of Observed Daily Mean Temperature, 1818 to 1823 

 Record of Observed Daily Mean Temperature, 1829 to 1859 

 Resulting Monthly Temperatures .... 



Mean Annual Temperatures .... 



Irregular Fluctuation in the Monthly Mean Temperature . 



Annual Fluctuation of the Temperature 



Examination of Epochs of Supposed Irregularities in the Annual Fluctuation 



Monthly Mean Temperature at Certain Hours of the Day . 



Mean Range of the Diurnal Fluctuation for each Month . 



Direction of the Wind, Method of Reduction 



Relative Frequency of each Wind .... 



Annual Variation in the Relative Frequency of the Wind . 

 Annual Fluctuation in the Resulting Direction of the Wind 

 Apparent Secular Change in the Mean Direction of the Wind 

 Relation of the Direction of the Wind to Temperature 

 Relation of the Direction of the Wind to Rain 

 Relation of the Direction of the Wind to Fair Weather 

 Atmospheric Precipitation, amount and frequency, 1817 to 1859 

 Remarks on the Occurrence of Snow and Frost 

 State of the Weather ..... 



Discussion of Atmospheric Pressure, 1829 to 1859 



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