CHARTS SHEWINC ll) BY ISOBARIC LINES THE MEAN PRESSURE OF THE ATMOSPHERE AND (2) BY ARROWS the PREVAILING WINDS OVER the GLOBE each MONTH from JUNEto NOVEMBER. 



Calms marfovl Uuis O FariaJile Winds Oujs ^ 



j _ •••' 



PLATE XXVT. 



JOHNSTON. EDINBURGH 



