SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE. 



443 



RESULTS 



METEOROLOGICAL OBSERVATIONS 



PROVIDENCE, R. I., 



EXTENDING OVER A PERIOD OF FORTY-FIVE YEARS, 



From December, 1831. to December, 1876. 



BY 



ALEXIS CASWELL, 



Professor of Natural Philosophy and Astronomy in Brown University, Providence, Rhode Island. 



WASHINGTON CITY: 



PUBLISHED BY THE SMITHSONIAN INSTITUTION. 



1882. 



