MADE AT MARIETTA, OHIO. 



39 



1829 to 1833, and 1846 to 1850 (ten years, comprising a total of 1931 entries) is 

 given in Table IX expressed in. percentage. 



Table IX. 



Direction of 

 wind. 



Sum,n 



er — April 15 to October 15. 



Winter— October 15 to April 15. 1 













Eelative frequency 



Eelative frequency ^ . 

 of wind. [ 



Relative frequencyiKelative frequency 



Eatio. 





of fair weather. 



of fair weather. 



of wind. 



s. 



21 



20 



1.0 



12 



14 



0.9 



s w. 



19 



21 



0.9 



24 



22 



1.1 



w. 



9 



10 



0.9 



17 



17 



1.0 



N.W. 



5 



7 



0.7 



11 



11 



1.0 



N. 



29 



24 



1.2 



24 



20 



1.2 



N.E. 



4 



4 



1.0 



3 



4 



0.8 



E. 



5 



5 



1.0 



3 



5 



0.6 



S. E. 



8 



9 



0.9 



6 



7 



0.9 



Fair weather is accompanied most frequently by N. wind, Ifoth in summer and 

 winter; in the half year including summer, easterly winds (except S. E.), and in 

 the half year including winter, westerly winds favor fair weather. 



ATMOSPHERIC PRECIPITATION. 



The amount of rain and melted snow collected is taken from the annual commu- 

 nications to Sniiman's Journal of Science and Arts, by Dr. Hildreth ; the frequency 

 of precipitation is taken from the record as well as the results of the earlier series 

 of observations by Mr. Wood. 



Table X. — Amount and Frequency oi 



Rain (ok Snow) observed at 



Marietta, 







BY Joseph Wood. 







Amount in Inches. 



Fkeqdenct, Ndmbek of Dats. 



1S17. 



1818. 



1819. 



1820. 



1821. 



1S22. 



1S23. 



1817. 



1816. 



1819. 



1820. 



1821. 



1822. 



1823. 



January, 





2.50 



3.20 



1.46 



1.35 



1.31 



4.42 







7 



4 



2 



2 



3 



February, 





3.00 



3.30 



5.79 



4.94 



1.65 



1.28 







8 



7 



5 



1 



1 



March, 





3.70 



5.57 



2.95 



3.70 



2.18 



6.21 







7 



4 



4 



2 



6 



April, 





2.30 



1.48 



3.93 



4.24 



5.11 



2.86 







4 



6 



6 



5 





May, 





5.90 



4.54 



3.50 



3.01 



2.35 



5.08 







9 



6 



4 



5 





June, 





2.45 



2.20 



3.80 



3.68 



4.09 



8.07 





6 



5 



4 



3 



7 





July, 





8.87 



3.26 



4.73 



4.52 



4.80 



6.91 





13 



10 



7 



5 



7 





August, 





5.30 



6.31 



1.53 



6.50 



2.15 



3.20 





9 



5 



6 



5 



4 





Septemb'r, 





7.10 



1.10 



0.20 



6.05 



4.45 



2.03 





5 



5 



1 



5 



6 





October, 





3.70 



2.25 



4.73 



1.41 



4.31 







7 



5 



8 



2 



7 





Novemb'r, 



4.45 



2.10 



0.70 



2.66 



2.60 



8.59 







3 



2 



4 



2 



6 





December, 



1.00 



4.00 



2.39 



3.83 



1.32 



2.39 



-- 



-- 



3 



4 



4 



1 



4 



-- 



Yearly 































sum. 



"" 



50.92 



36.30 



39.11 



43.32 



43.38 





" 



■" 



71 



61 



44 



56 





