L 19 J 



December the i/, heavy rain and high wind at S. W. fucceeded 

 by variable weather, but moftly dry, until the loth, on the- 

 night of which there was a ftorm at W. or S. W. The i ith 

 and 1 2th, dry; wind N. W. 13th, wet; wind S. W. 14th, dry ; 

 at night a viofent ftorm at W. 15th, a flight fhower ; thermo- 

 meter 48% barometer 28.9. The i6th, rain, and at night it 

 blew hard at N. W. ; fome rain and fnow. 17th, fine, as alfo 

 the following days until the 23d, but ftorms at S. W. ; thermo- 

 meter moflly at 46', barometer 29.3. 23d, wind W. ; heavy 

 rain at night. 24th and 25th, calm, no rain by day ; thermo- 

 meter 46°. 27th, fine ; froze hard at night ; thermometer 28° ; 

 and the fame weather on the 28th. 29th, rain. 30th and 31ft, 

 fine ; floft at night ; thermometer by day not below 42". 



Of the Signs of wet and dry Weather. 



If metereological obfervations were taken at proper diftances 

 all over the globe, and with tolerable accuracy, they probably 

 would in a few years difclofe that connexion which all the 

 phsenomena of the atmofphere have with each other, and the 

 particular fpecies of weather which would take place in any 

 given region might be forefeen either to a certainty or at leaft 

 to a high degree of probability, but until this happens the only 

 ufe of metereological tables, as far as regards the art of forming 

 prognoftics, is to exhibit a view of the fort of weather that 

 moft ufually precedes wet, dry, hot or cold feafons (thefe being 

 the modifications moft interefting as well to agriculture as to 

 medicine) and tracing their recurrency by the laws of proba- 



C 2 bility. 



