No. II. 



METEOROLOGICAL OBSERVATIONS, 

 FOR ONE ENTIRE YEAR. 



MADE by William Dunbar, Esq. at the Forest four and a 

 half miles east of the river Mississippi in North Lat. 31° 28' and 

 Long. 91° 30' West of Greenwich, on an eminence about 150 feet 

 higher than the level of the highest zoaters of the annual inunda- 

 tion of the Mississippi; beginning on the 1st day of February 1199, 

 and ending the 31st January 1800, inclusive. 



Communicated by Thomas Jefferson, President of the Society. 



Read 16th January, 1801. 



IN the following observations, the strength of the wind is 

 divided into four degrees, viz. No. 1. indicates a light Zephyr. 

 No. 2. a brisk breeze. No. 3. a very strong wind. No. 4. 

 a tempest or hurricane. When the course of the wind is 

 noted, but the strength omitted, it is to be understood that 

 the direction of the wind has been observed by the gentle 

 movement of the clouds, or, perhaps, by the progress of smoke, 

 while to the senses a perfect calm reigns below. When two 

 currents of air have been observed, they are noted, the strength 

 referring always to the latter current. 



