CHART SHEWING (I) BY ISOBARIC LINES THE MEAN PRESSURE OF THE ATMOSPHERE AND (2) BY ARROWS THE PREVAILING WINDS FOR the YEAR. 



Thins. Roy Soc.Ectiii.Vol.XXV. 



(aims TnarJces/. t/iu.f Tfiriahh Winds thus 4fr 



PLATE XXVII 



CHARTS shewing by ARROWS the LEAST FREQUENT WINDS which prevail in JANUARY and JULY, the ISOBARIC LINES are also given for these MONTHS. 



W.& A. K. JOHNSTON EDINBURGH 



