130 OBSEKVATIONS ON THE WINDS. 



(51.) For the N.E. Trade he had 803 tracks — 424 Dutch, and 379 

 American. The region of this Trade he divided into four parts, viz. : — 

 1. The Eastern, or that frequented by ships going South and passing to 

 the Eastward of the Cape Verde Islands. 2. The mean route of vessels 

 going South and passing Westivard of those islands. 3. The Central part, 

 containing the routes to the Southward of ships from Europe and America. 

 4. The part containing the Westernmost liomeward routes of American 

 vessels. 



For February and March, he found that — 



1. East of the Cape Verdes, the mean rate of 20 vessels, from 30° N. 



to 6° N., was 6-1 miles. 



2. West of the Cape Verdes, the mean rate of 71 vessels, from 30° N. 



to b° N., was 6*3 miles. 



3. For the Central part, the mean rate of 262 vessels, from 25° N. to 



5° N., was 6*5 miles. 



4. For the Westernmost route, 44 American ships sailing from the 



Equator to 25° N., between long. 32° and 33° W., gave a mean 

 rate of 6*7 miles. 



Hence, for the whole region of the N.E. Trade, during February and 

 March, the Mean Bate was 6' 4 miles. 



For August and September, when the N.E. Trade is weakest, and is in 

 its most Northern position — 



1. East of the Cape Verdes, the mean rate of 18 vessels, from 30° N. 



to 15° N., was about 6'3 miles. 



2. West of the Cape Verdes, the mean rate of 155 vesssls, from 30° N. 



to 15° N., was 6*5 miles. 

 •3. For the Central part, the mean rate of 198 vessels, from 30° N. to 



15° N., was 5-3 miles. 

 4. On the Westernmost route, 35 American homeward-bound vessels, 



from 10° N. to 30° N., gave a mean rate of 48 miles. 



And for the whole region of the N.E. Trade, during August and Septem- 

 ber, the Mean Bate was 5-7 miles. 



For the strength of the S.E. Trade, there were 655 tracks — 417 Dutch, 

 and 238 American ; and the regions given are : — 1. The Western, in which 

 the vessels go Southward. 2. The Central, in which the ships are coming 

 from the East Indies. 



During August and September, it appears that — 



1. For the Western route, 232 vessels gave a mean rate of 7*5 miles. 



2. For the Central route, 124 vessels gave a mean rate of 7'4 miles. 



During February and March, the results are as follows — 



1. For the Western route, 142 vessels gave a mean rate of 7-0 miles. 



2. For the Central route, 157 vessels gave a mean rate of 7-1 miles. 



The S.W. Monsoon region gives, according to 90 Portuguese ships, an 

 average rate of 4*9 miles for February and March; and 5*3 miles for 

 August and September. 



