ARTICLE XVI. 



Supplementary Observations on the Storm which was experienced throughout the 

 United States about the 20th of December, 1836. By Elias Loomis, Professor 

 of Mathematics and Natural Philosophy in Western Reserve College, Ohio. 

 Read May 6, 1842. 



Since my article on the storm of December 20th, 1836, was communicated 

 to the society, I have obtained two additional meteorological registers, em- 

 bracing barometric observations for the same period, namely, from Fort Snell- 

 ing, by Mr. J. N. Nicollet, and from Cincinnati, by Professor Joseph Ray. 



Fort Snelling, 845 Feet above the Sea. Latitude 44° 53' N.; Longitude 93° 12' W. 



1836. 



Barometer. 



At. Therm. 



Ex. Therm. 



Remarks. 



Dec. 18, 



9, A. M. 



29.160 



60.0 



+ 3.4 



South wind. Clear sky. 





Noon, 



.155 



60.0 



+ 18.0 



" Cloudy. 





3, P. M. 



.100 



58.0 



+ 22.5 



(( <( 





9, P. M. 



.065 



43.4 



+ 18.4 



Strong south wind. Cloudy. 



19, 



9, A. M. 



28.990 



60.0 



+ 23.0 



Calm. " 





Noon, 



.962 



61.0 



+ 25.0 



South wind. " 





3, P. M. 



.950 



63.0 



+ 25.0 



(t (( 





n, p. M. 



.875 



64.0 



+ 24.0 



Cloudy, accompanied with sleet. 



20, 



9, A. M. 



.850 



52.0 



— 5.0 



N. W. wind. Snow, with sleet. 





Noon. 



.746 



34.5 



— 5.6 



Strong N. W. wind. Storm begins 11|''. 





3, P. M. 



.740 



50.0 



~ 5.6 



" " " Snow storm increases. 





9, P. M. 



.840 



43.5 



— 8.7 



Very strong N. W. wind; hard snow; tempes- 

 tuous; storm over at 10 o'clociv. 



21, 



9, A. M. 



29.342 



58.2 



— 21.6 



N. W. wind, very moderate. Clear sky. 





Noon, 



.350 



48.0 



— 10.5 



S. W. wind; moderate; 2 inches snow on the 

 ground. 





3, P. M. 



.380 



56.0 



— 2.4 



S. W. wind. Clear sky. 





9, P. M. 



.410 



42.0 



— 19.5 



No wind. " 



22, 



9, A. M. 



.180 



52.0 



— 4.4 



S. E. wind. Cloudy. 





Noon, 



.000 



49.4 



+ 2.3 



Strong S. E. wind. Cloudy. 





3, P. M. 



28.845 



43.0 



+ 5.4 



(( (( (( (6 





9, P. M. 



.662 



52.0 



+ 14.4 



Calm. Snow commenced at 6, P. M. 



