4:34: 



THE PHYSICAL GEOGRAPHY OF THE SEA. 



Average Speed through the Trade-winds of the North Atlantic and South Indian 



Oceans. 



Month. 



January 



February 



March 



April 



May 



June 



July 



August 



September.... 



October 



November.... 

 December.... 



Means. 



Knots per Hour from 



10° to 15°. 





8 



1\ 



8 



7i 



8i 



9 



5^ 



M 



n 



G 

 6 





6^ 

 6 



7 

 7 

 8 



n 



8 



n 



8^ 



8 

 6^ 



11 



15° to 20°. 





7i 



6 



7 



51 



6i 



8 



8 



6 



6 



6J 



6 



61 



6^ 





7 



6f 



7 



7J 



7^ 



71 



8i 



8i 



8 



8 



7 



6i 



20° to 25°. 



^1 



6 

 5 



5i 



4 



6i 



5i 



6i 



4i 



4 



6 



4^ 



5^ 



7i 5i- 





6 

 6 



6^ 



6 



6 



7 



7 



7i 



61 



5f 



5i 



5 



6^ 



Average, 



?5 



7 



6 



6i 



6 



7 



7^ 



61- 



5 



5 



61 



5^ 



6 



6i 





6i 

 6 



6i 

 6i 



7 



7i 



7J 



7i 



7i 



7i 



61 



6 



Course steered through 



N.E. Trades. 

 (N. Atlantic.) 



N. 49° W. 



N. 46 W. 



N. 47 W. 



N. 48 W. 



N. 46 W. 

 N. 43 

 N. 46 



N. 40 W. 



N. 50 W. 



N. 45 W. 



N. 49 W. 



N. 48 W. 



W. 

 W. 



N. 47 W. S. OOP W 



S.K Trades. 

 (S. I. Ocean.) 



S. 69° W. 



S. 70° W. 



S. 69° W. 



Average course steered through the N.E. trades of the N. Atlantic Ocean, N. W. i W. 

 " " " " S.E. trades of the S. Indian Ocean, W.S.W. 



Average Speed through the Trade-winds of the North and South Atlantic Oceans. 



Jlonth. 



Knots per Hour from 



25° to 20°. 20° to 15°. 15° to 10°. Average, 





r i ^ 



H 











^t 



Course steered through 



S.E. Trades. 

 (S. Atlantic.) 



N.E. Trades, 

 (N. Atlantic.) 



January..., 

 February.. 



March 



April 



May 



June 



July 



August 



September 

 October ... 

 November . 

 December . 



6 



4^ 

 6.^ 

 5^ 

 5i 

 5i 



H 

 5 



5^ 

 5i 

 6^ 

 5^ 



4^ 



5i 



5 



6 



7 



5^ 



3t 



4i 



4 



4J 



5i 



5^ 



6 



5^ 



51 



6 



6 



5i 



6i 



6 



6^ 



5J 



5^ 



6^ 



6^ 



6^ 



^\ 



6 



1\ 



6^ 



5^ 



4^ 



5i 



6 



5i 



6 



6 



61 



6^ 



7 



6i 



6 



7 



5i 



6i 



6i 



7^^ 



7 



71- 



n 



7 



5 



4^ 



4 



5 



41 



5i 



7f 



6 



5i 



6 



6 



6 



6i 

 6 



5i 

 6i 



5^ 

 6^ 

 51 



6 

 6 

 ^\ 



6^ 



6 



51 



6 



5i 



4^ 



4^ 



5 



5 



N. 54° W 

 N. 55 W 

 N. 55 

 N. 53 

 N. 55 

 N. 55 

 N. 55 

 N. 55 W 

 N. 55 W 

 N. 56 

 N. 55 

 N. 55 



W. 

 W. 



w. 

 w. 

 w. 



w. 



AV. 

 W. 



S. 21° E. 

 S. 25 E. 

 S. 22i E. 

 S. 22^ E. 

 S. 241 E. 

 S. 28 E. 

 S. 27 E. 

 S. 28^ E. 

 S. 22^ E. 

 S. 20 E. 

 S. 22.^ E. 

 S. 23 E. 



Means. 



5^ 



5i 



6 



6i 6 



51 



N. 55 W. 



S, 24° E. 



Average course steered through the S.E, trades of the S. Atlantic, N.W. by W. 

 " " N.E. trades of the N. Atlantic, S. S.E. 



814. It is well to observe, that on each of these three oceans, 

 Ships used a.'janemom- thoLigh the clircction of the wlncl is the same, the 

 **^"* course steered by each fleet is different; conse- 



quently, these anemometers are at different angles with the wind-, 

 through the southeast trades the wind is nearly aft in the Atlan- 

 tic, and quartering in the Indian Ocean, giving an average sail- 

 ing speed of 7 knots an hour in the latter, and of 6 in the former; 



