344 



Meteorological Journal for the year 1841. 



Art. XY. — Abstract of a Meteorological Joui^nal, for the, year 

 1841, kept at Marietta, Ohio, Lat. 39° 25' N., Lon. 4° 28' 

 W. of Washington City ; by S. P. Hildreth, M. D. 



Remarks on the year 1841. 



The past year has not been remarkable for any striking changes 

 in the temperature, or commotion in the elements. The mean 

 heat for the year is very near that of this climate for a series of 

 years, being 52.18°. The distribution varies very considerably, 

 as it is divided amongst the seasons ; some springs being cool, 

 others warm ; so also with summers and autumns, while the gen- 

 eral amount varies but little in different years. The winter was 

 comparatively mild, the mercury sinking below zero only on two 

 mornings during this period. The mean is 32.51°, being two de- 

 grees cooler than that of 1840. There fell but eight or ten inches 

 of snow at different times. The Ohio river at Marietta was 

 closed only for a few days by the ice — from the 3d to the 8th of 

 January, but navigation was impeded by floating ice as early as^ 

 the 21st of December. In February, there was some severe 

 weather, from the 10th to the 15th of the month. The mercury 

 was at 8° above zero on the morning of the 11th, and only 12° 

 above at noon ; at this period we often have the coldest weather 

 in the year. The Ohio was again filled with floating ice, and 

 for a few days boats ceased to run ; after the 20ih of the month, 



