SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE. 



WINDS 



NORTHERN HEMISPHERE 



JAMES H. COFEIN, A.M., 



PKOFESSOR OF MATHEMATICS AND NATURAL nilLOSOPHY IM 

 r.AFATETTE COLLEGE, EASTON, PENNSYLVANIA. 



Accepted for Publication, NoTember, 1850. 

 Revised, November, 1852. 



