704 



WINDS OF THE GLOBE. 





June, July, August. 



December, January, February. 1 



^ 



^ 

 ^ 



w 





m 





^ 



^ 

 fc 



2 45 

 4 68 



23 

 13 



tc 



13 

 11 



m 



en 



6 



0.2 



5 

 0.1 



^ 



^ 



Northern Venezuela 

 Catharina Sophia (Guiana) . 



6 

 3 



17 

 41 



32 



22 



22 

 24 



8 

 5 



9 

 4 



4 



0.1 



0.3 



1 



3 



1 



3 

 10 



If N E. and E. are taken, as tlie trne representatives of the trade-winds, we see 

 that they amount to 49 per cent, of all winds in the rainy season of Northern Vene- 

 zuela, and to 68 per cent, in the dry season. In Guiana the trades are more 

 regular, but it seems that it lies somewhat to the S. of the thermal equator ; as 

 December, January, and February are rainy months, the proportion of N. E. 

 winds is then greatest. (See Plates 5, 6, and 7.) 



In Tropical Brazil we have only the observations in Rio Janeiro, from which 

 we deduct the percentages given in the following table. To gain a better insight 

 of the winds of this country, it is necessary to obtain observations made on the 

 Atlantic Ocean near the coast. 









June, July, August. 



December, January, February. 





H 





N 





^ 





i 





H 





« 





i 





^ 









fc 



fe 



H 



K 



lA 



m 



^ 



fc 



^ 



^ 



H 



m 



m 



m 



^ 



^ 



Lat. 190-210 S. 





370-390 W. . 



11 



30 



17 



23 



12 



4 



0.6 



0.7 



24 



37 



12 



10 











4 



13 







350-370 w. . 



15 



15 



24 



34 



4 



2 







5 



31 



35 



17 



10 



3 



0.4 



0.4 



3 



Lat. 20O-25O S. 



long. 



370-390 w. . 



21 



35 



12 1 13 



8 



3 



2 



6 



40 



30 



7 



6 



3 



1 



8 



11 



Rio Janeiro 







19 



19 



131 



17 







2 



12 



6 



11 



b 







4b 



4 



6 8 



IV 



On the Atlantic Ocean, near the coast of Brazil, the winds are more northerly 

 in the rainy season, from December to February, or in the summer of the southern 

 hemisphere. As to Rio Janeiro, the winds are influenced by the locality. The 

 sea-wind (S. E.) generally begins at 9 A. M. and blows till sunset, while land- 

 wind and calms prevail night and morning. 



The northerly direction of the winds off the coast of Brazil points to a 

 barometrical minimum in the interior to the west of the Organ Mountains in the 

 campos, as it should do, considering the great heat of the summer of the S. hemi- 

 sphere, and the sparse covering of trees on the campos. Easterly winds are much 

 more regular and strong in Northern Brazil^ than on the coast near Rio Janeiro. 

 In the latter region they are to be considered as sea-breezes rather than trade-winds. 



In the La Plata States and on the Atlantic Ocean near them, the few observations 

 we have give the following results in percentages : — 



' Burton gives a description of the strength of the E. winds on the lower S. Francisco River in 

 " Ilighlands of Brazil." 



