DISCUSSION AND ANALYSIS OF WINDS. 



721 



N. Illyi-ia . 



Hoch-Obir . 



Trieste 



Ragusa 



S. W. Bohemia 



N. E. Bohemia 



Moravia 



Vienna 



S. GUO W. 



S. 82 W. 



S. 83 E. 



S. 8(i E. 



S. 87 W. 



N. 4G W. 



N. 51 W. 



N. 70 W. 



S. 680W. .23 

 S. 65 W.'.22 

 S. 74 

 N. 38 

 S. 80 

 N. 68 

 N. 61 

 N. 70 



Autumn. 







, 

















a S 



.2 = 











g-a 



K '" 



S. 



680 W. 



.IQl 



s. 



81 \V. 



.33 



s. 



80 E. 



.38 



s. 



70 E. 



.84 



s. 



83 W. 



.47 



N. 



83 W. 



.19 



N. 



79 W. 



.21?, 



N. 



65 W. 



.24 



710 w. 



83 W. 



79 E. 



52 E. 



86 W. 



71 W. 



51 W. 



85 W. 



(See also Plates 5, 6, and 9.) 



SOUTHERN EUROPE. 



A belt of high pressure in the summer months is to be found about 40° N. in 

 the Mediterranean. South of it we must expect to find N. and N. E. winds. Yet, 

 as generally the pressure increases towards the W., that is, the eastern part of the 

 Atlantic Ocean, the winds of summer are rather due N. and N. W. The air is 

 attracted towards the Sahara Desert and other hot parts of xlfrica. The following 

 are the percentages : — 



11. N. 182. Lisbon . . 



10. N. 335. N. W. Spain 



10. N. 343. N. Spain . 



11. N. 184. S.W.Spain 

 II. N. 196. S.E.Spain 



10. N. 375. Kome . . 



11. N. 205. Malta . . 

 11. N. 208. Janina . . 

 11. N. 206. Corfu . . 

 11. N. 208(a). Athena . 



Summer. 



Winter. 





H 





w 





i 





^ 





H 





«• 





^ 





^ 



(5 



fc 



H 



m 



m 



m 



^ 



fc 



^ 



a' 



w 



ai 



to 



m 



^ 



a 



41 



22 



4 



2 



2 



12 



7 



11 



27 



33 



9 



1 



6 



8 



10 



6 



10 



41 







U.5 



3 



23 



5 



17 



10 



28 



0.4 



4 



10 



32 



5 



11 



9 



17 



4 



y 



7 



3 



15 



35 



10 



12 



7 



23 



10 



7 



10 



22 



14 



8 



3 



6 



26 



27 



12 



4 



22 



12 







10 



23 



26 



2 



4 



4 



12 



20 



30 



10 



8 



11 



6 



■ 6 



9 



5 



9 



7 



17 



28 



19 



14 



10 



6 



4 



21 



21 



20 



4 



33 



21 



12 



6 



13 



/ 



5 



3 



11 



22 



1 



9 



3 



11 



7 



30 



5 



16 



8 



10 



7 



22 



11 



ai 



30 



15 



10 



10 



3 



1 



3 



27 



7 



7 



10 



34 



18 



2 



10 



12 



22 



8 



9 



18 



5 



5 



10 



23 



VI 



13 



15 



31 



5 



4 



5 



15 



17 



31 



5 



2 



16 



21 



3 



5 



26 



19 



4 



6 



15 



12 



11 



8 



The Mediterranean region S. of 40° L. N. belongs most decidedly to the sub- 

 tropical belt; that is, the summer is nearly or quite rainless, and the more we 

 advance southward, the longer is this rainless period, extending to about six 

 months at Malta and in Algeria, and to nine months in Lower Egypt, while the 

 whole year is nearly rainless in the Sahara S. of 30°, as well as in Upper Egypt. 

 In these conditions, especially when considering a region not deficient in vapor of 

 water, as the shores of the Mediterranean, the absence of rain in summer indicates 

 in our hemisphere very prevailing northerly winds. If even the wind-vane indi- 

 cates southerly winds, we may be sure that they are merely local sea-winds, or 

 winds deflected from their course by mountain chains, etc., provided that the places 

 where they occur have the rainless summer of the sub-tropical zone. Now this is 



91 July, 1875. 



