BAROMETRICAL WIND ROSES 



SHOWING THE CONNECTION BETWEEN THE 



DIRECTION OF THE WIND AND CHANGES IN THE BAROMETER. 



COMPUTED AND DEAMX BY JAMES II. COFFIN. 



1853. 



Tfie icidlh of the filiading at the fieceml poinf-i n/ coitq^'iss shoics the average RISE or FALL v/ the Barometer per day while the teind 

 '3/rom tho.-<e points; theplun (-{-) dnioliii'j a rise, and the miniLS (— ) a/atL Tlte arroies that proceed from the centre, ahoir the points <■/ 

 I and jniniiniun pressure. The arrow pointing toward the centre ehoica the mean direction qfthe icinj. 



