PLATE VII. 



O S- 10 15 20- .251 



jg 



^■Vy'^ 



1/^ 



Be 



;/ 



-^^1 



^ 



^9- 



55 



P1» 



5C 



KedvLCcd from. Special Chart prepared at the Meteorological Office.] 



North-Easterly Type of Weather. 



Isobars are shown by black lines, with indications of the height of the barometer. 

 Wind.— Arrows flying with the wind, show direction and force, thus : 



y = forces 5 to 7 (velocity, 28 to 40 miles per hour). 



i^ = forces I to 4 (velocity, 8 to 23 miles per hour). ^^^ 



Vol. 7.] 



